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A018025
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Powers of cube root of 17 rounded to nearest integer.
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24
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1, 3, 7, 17, 44, 112, 289, 743, 1911, 4913, 12633, 32482, 83521, 214756, 552198, 1419857, 3650852, 9387369, 24137569, 62064487, 159585272, 410338673, 1055096276, 2712949630, 6975757441, 17936636689, 46120143717, 118587876497, 304922823712, 784042443182
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OFFSET
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0,2
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LINKS
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MATHEMATICA
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PROG
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(Python)
from sympy import integer_nthroot
def A018025(n): return -integer_nthroot(m:=17**n, 3)[0]+integer_nthroot(m<<3, 3)[0] # Chai Wah Wu, Jun 18 2024
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CROSSREFS
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Cf. A010589, A018024, A018026, and powers of cube root of k rounded up: A017980 (k=2), A017983 (k=3), A017986 (k=4), A017989 (k=5), A017992 (k=6), A017995 (k=7), A018001 (k=9), A018004 (k=10), A018007 (k=11), A018010 (k=12), A018013 (k=13), A018016 (k=14), A018019 (k=15), A018022 (k=16), this sequence (k=17), A018028 (k=18), A018031 (k=19), A018034 (k=20), A018037 (k=21), A018040 (k=22), A018043 (k=23), A018046 (k=24).
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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