A135632 Nearest-neighbors of Mersenne primes.

2, 4, 6, 8, 30, 32, 126, 128, 8190, 8192, 131070, 131072, 524286, 524288, 2147483646, 2147483648, 2305843009213693950, 2305843009213693952, 618970019642690137449562110, 618970019642690137449562112

Offset

1,1

Links

Table of n, a(n) for n=1..20.

Mathematica

{#-2, #}&/@(2^MersennePrimeExponent[Range[10]])//Flatten (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Jan 04 2020 *)

Crossrefs

Cf. A000668.

Sequence in context: A117912 A092047 A057809 * A068541 A329887 A108425

Adjacent sequences: A135629 A135630 A135631 * A135633 A135634 A135635

Keyword

easy,nonn

Author

Omar E. Pol, Nov 27 2007

Status

approved