A134721 Bisection of Mersenne primes A000668.

3, 31, 8191, 524287, 2305843009213693951, 162259276829213363391578010288127

Offset

1,1

Links

Table of n, a(n) for n=1..6.

Formula

a(n) = A000668(2*n - 1).

Example

a(3) = 8191 because the (2*3-1=5)th Mersenne prime is 8191.

Crossrefs

Cf. A000668, A134722.

Sequence in context: A048562 A022499 A129209 * A002707 A283247 A261472

Adjacent sequences: A134718 A134719 A134720 * A134722 A134723 A134724

Keyword

easy,nonn

Author

Omar E. Pol, Nov 11 2007

Status

approved