1,2

Differences between exponents of Mersenne primes.

Table of n, a(n) for n=1..46.

Mersenne primes (of form 2^p - 1 where p is a prime): A000668, A000043.

Sequence in context: A137316 A064851 A305353 * A193819 A182786 A009279

Adjacent sequences: A134455 A134456 A134457 * A134459 A134460 A134461

nonn

Alessio 'BiGAlex' Periloso (bigalex(AT)bigalex.it), Oct 26 2007

Checked and extended by N. J. A. Sloane, Oct 29 2007

More terms from Derek Maciel, Jan 07 2018

a(45)-a(46) from Ivan Panchenko, Apr 11 2018

approved