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A000659
a(n) = 2^a(n-1) + a(n-2).
1
0, 0, 1, 2, 5, 34, 17179869189
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OFFSET
0,4
COMMENTS
The next term has 5171655948 digits. -
Franklin T. Adams-Watters
, Jul 03 2009
LINKS
Table of n, a(n) for n=0..6.
MATHEMATICA
Join[{a=0, b=0}, Table[c=2^b+a; a=b; b=c, {n, 5}]] (*
Vladimir Joseph Stephan Orlovsky
, Apr 13 2011 *)
nxt[{a_, b_}]:={b, 2^b+a}; NestList[nxt, {0, 0}, 6][[All, 1]] (*
Harvey P. Dale
, Apr 09 2022 *)
CROSSREFS
Cf.
A000643
.
Sequence in context:
A241586
A000665
A058882
*
A164919
A272678
A063443
Adjacent sequences:
A000656
A000657
A000658
*
A000660
A000661
A000662
KEYWORD
nonn
AUTHOR
N. J. A. Sloane
STATUS
approved
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Last modified August 5 19:08 EDT 2024. Contains 374954 sequences. (Running on oeis4.)