A377714 Cogrowth sequence for the 8-element group C4 X C2 = <S,T | S^4, T^2, [S,T]>.

1, 1, 2, 16, 72, 256, 992, 4096, 16512, 65536, 261632, 1048576, 4196352, 16777216, 67100672, 268435456, 1073774592, 4294967296, 17179738112, 68719476736, 274878431232, 1099511627776, 4398044413952, 17592186044416, 70368752566272, 281474976710656

Offset

0,3

Comments

Gives the even terms, all odd terms are 0.

Links

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

Example

a(2)=2 corresponds to the words SSSS = TTTT = 1.

Crossrefs

Cf. A377627 (C6 X C2).

Sequence in context: A209538 A006729 A007758 * A207874 A208374 A207677

Adjacent sequences: A377711 A377712 A377713 * A377715 A377716 A377717

Keyword

nonn

Author

Sean A. Irvine, Nov 04 2024

Status

approved