A088663 - OEIS

A088663

p[n_, k_]=Product[(E/(2-E))^i, {i, 1, n}]/Product[(E/(2-E))^i, {i, Floor[n/2^k], n}], a(n) = Sum[Floor[p[n, k]/(8*p[n-1, k])], {k, 1, 8}]

0, 0, -1, 0, 1, 0, -8, 0, 25, 0, -97, 0, 367, 0, -1398, 0, 5259, 0, -19878, 0, 75319, 0, -285137, 0, 1078711, 0, -4081933, 0, 15449144, 0, -58467488, 0, 221260378, 0, -837337471, 0, 3168858565, 0, -11992319160, 0, 45383925816, 0, -171751869342, 0, 649981903584, 0, -2459806349188, 0

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OFFSET

0,7

LINKS

Table of n, a(n) for n=0..47.

MATHEMATICA

p[n_, k_]=Product[(E/(2-E))^i, {i, 1, n}]/Product[(E/(2-E))^i, {i, Floor[n/2^k], n}]

digits=80

f[n_]=Sum[Floor[p[n, k]/(8*p[n-1, k])], {k, 1, 8}]

at=Table[f[n], {n, 2, digits}]

CROSSREFS

Sequence in context: A028604 A292531 A337550 * A291681 A011997 A187162

Adjacent sequences: A088660 A088661 A088662 * A088664 A088665 A088666

KEYWORD

sign,uned,less

AUTHOR

Roger L. Bagula, Nov 21 2003

STATUS

approved