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A171451 a(n) = 2^C(n, 2) * 2^floor(n/3). 2
1, 1, 2, 16, 128, 2048, 131072, 8388608, 1073741824, 549755813888, 281474976710656, 288230376151711744, 1180591620717411303424, 4835703278458516698824704, 39614081257132168796771975168, 1298074214633706907132624082305024, 42535295865117307932921825928971026432 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

Hankel transform of A171450.

LINKS

Table of n, a(n) for n=0..16.

FORMULA

a(n) = 2^A171452(n).

PROG

(PARI) a(n) = 2^(n*(3*n-1)\6); \\ Jinyuan Wang, Feb 25 2020

CROSSREFS

Cf. A171450, A171452.

Sequence in context: A333719 A338933 A161737 * A012459 A012463 A037517

Adjacent sequences:  A171448 A171449 A171450 * A171452 A171453 A171454

KEYWORD

nonn,easy

AUTHOR

Paul Barry, Dec 09 2009

EXTENSIONS

More terms from Jinyuan Wang, Feb 25 2020

STATUS

approved

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Last modified September 17 19:58 EDT 2021. Contains 347489 sequences. (Running on oeis4.)