A363402 a(n) = n * (4^n - 2^n) / Clausen(n, 0).

0, 2, 12, 56, 480, 992, 4032, 16256, 261120, 784896, 1047552, 4192256, 33546240, 67100672, 268419072, 1073709056, 34359214080, 17179738112, 206157643776, 274877382656, 2199021158400, 4398044413952, 17592181850112, 70368735789056, 1125899839733760, 5629499366440960

Offset

0,2

Links

Table of n, a(n) for n=0..25.

Formula

a(n) = n * A020522(n) / A160014(n, 0).

Maple

# Using function 'Clausen' from A160014.
a := n -> n * (4^n - 2^n) / Clausen(n, 0):
seq(a(n), n = 0..25);

Crossrefs

Cf. A160014, A363403, A363395.

Sequence in context: A098453 A256150 A180073 * A067125 A177782 A005038

Adjacent sequences: A363399 A363400 A363401 * A363403 A363404 A363405

Keyword

nonn

Author

Peter Luschny, Jun 08 2023

Status

approved