A212655 Denominator of Bernoulli(2*n,1/2) / Period of length 2: repeat 12, 60.

1, 4, 112, 64, 2816, 93184, 4096, 278528, 8716288, 2883584

Offset

1,2

Comments

See A165949(n) = (A027642(n+1)=A027762(n))/A165734(n).

a(n) is divisible by 4^(n-1).

Links

Table of n, a(n) for n=1..10.

Formula

a(n) = A033469(n)/A040874(n).

a(n) = 4^(n-1) * A165949(n).

Example

a(1) = (B(2,1/2)=12)/12=1, a(2)=240/60=4, a(3)=1344/12=112, a(4)=3840/60=64.

Crossrefs

Cf. A000302.

Sequence in context: A181272 A214107 A202518 * A181485 A135917 A241798

Adjacent sequences: A212652 A212653 A212654 * A212656 A212657 A212658

Keyword

nonn,less

Author

Paul Curtz, Apr 14 2013

Status

approved