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A203771 v(n+1)/v(n), where v=A203770. 2
2, 289, 9248, 63266116, 10249110792, 554962779291904, 284140942997454848, 62291092000572728444176, 77863865000715910555220000, 48803803104917291287339317067776, 126499457647945619016783509839675392 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

See A093883 for a discussion and guide to related sequences.

LINKS

Table of n, a(n) for n=1..11.

MATHEMATICA

f[j_] := Floor[(j + 1)/2]; z = 16;

u := Product[f[j]^4 + f[k]^4, {j, 1, k - 1}]

v[n_] := Product[u, {k, 2, n}]

Table[v[n], {n, 1, z}]          (* A203770 *)

Table[v[n + 1]/v[n], {n, 1, z}] (* A203771 *)

CROSSREFS

Sequence in context: A065498 A296591 A296607 * A057746 A132518 A277126

Adjacent sequences:  A203768 A203769 A203770 * A203772 A203773 A203774

KEYWORD

nonn

AUTHOR

Clark Kimberling, Jan 05 2012

STATUS

approved

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Last modified September 25 23:58 EDT 2021. Contains 347664 sequences. (Running on oeis4.)