A135632 - OEIS

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

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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