A190297 Bisection of A013697.

1, 12, 57, 245, 1005, 4063, 16327, 65435, 261965, 1048259, 4193742, 16776218, 67107091, 268432305, 1073736223, 4294957340, 17179851485, 68719445272, 274877851009, 1099511528337, 4398046334325, 17592185730143, 70368743618958, 281474975717403, 1125899905076842

Offset

1,2

Links

Table of n, a(n) for n=1..25.

Formula

a(n) = floor(1/(zeta(2n)-1)).

Crossrefs

Sequence in context: A051877 A212065 A121693 * A072259 A272233 A283164

Adjacent sequences: A190294 A190295 A190296 * A190298 A190299 A190300

Keyword

nonn

Author

N. J. A. Sloane, May 13 2011

Status

approved