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A100102
a(n) = 2^(2*n)-(2*n-1).
3
2, 3, 13, 59, 249, 1015, 4085, 16371, 65521, 262127, 1048557, 4194283, 16777193, 67108839, 268435429, 1073741795, 4294967265, 17179869151, 68719476701, 274877906907, 1099511627737, 4398046511063, 17592186044373, 70368744177619, 281474976710609, 1125899906842575
OFFSET
0,1
LINKS
FORMULA
a(n) = A000302(n) - A005408(n-1). - Amiram Eldar, Dec 01 2021
MAPLE
seq(2^(2*n)-(2*n-1), n=0..20);
MATHEMATICA
Table[2^(2*n) - (2*n - 1), {n, 0, 25}] (* Amiram Eldar, Dec 01 2021 *)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Jorge Coveiro, Dec 26 2004
EXTENSIONS
More terms from Emeric Deutsch, Feb 15 2005
STATUS
approved