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A136269

Floor of sum of the first 10^n cube roots.

1, 16, 350, 7504, 161593, 3481214, 75000049, 1615826124, 34811916483, 750000000499

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OFFSET

0,2

COMMENTS

Conjecture: For n = 3k, a(n) = (3/4)*10^(4n/3)+5*10^(n/3-1)-1.

LINKS

EXAMPLE

For n = 6, a(6) = (3/4)*10^8 + 5* 10^1-1 = 75000049.

PROG

(PARI) /* For this sequence, p = 3 */ g2(n, p) = for(j=0, n, s=0; for(x=0, 10^j, s+=x^(1/p)); print1(floor(s)", "))

CROSSREFS

KEYWORD

nonn

AUTHOR

STATUS

approved