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A363403
a(n) = (4^n - 2^n) / Clausen(n, 1).
2
0, 1, 2, 28, 8, 496, 96, 8128, 2176, 130816, 15872, 2096128, 6144, 33550336, 44736512, 536854528, 8421376, 8589869056, 86114304, 137438691328, 3331850240, 2199022206976, 127479578624, 35184367894528, 103104380928, 562949936644096, 750599926710272, 9007199187632128
OFFSET
0,3
FORMULA
a(n) = A020522(n) / A160014(n, 1).
MAPLE
# Using function 'Clausen' from A160014.
a := n -> (4^n - 2^n) / Clausen(n, 1):
seq(a(n), n = 0..25);
CROSSREFS
KEYWORD
nonn
AUTHOR
Peter Luschny, Jun 08 2023
STATUS
approved