A139238 First differences of Mersenne numbers A001348.

4, 24, 96, 1920, 6144, 122880, 393216, 7864320, 528482304, 1610612736, 135291469824, 2061584302080, 6597069766656, 131941395333120, 8866461766385664, 567453553048682496, 1729382256910270464, 145268109580462718976, 2213609288845146193920

Offset

1,1

Comments

Also, first differences of 2^prime(n) = A034785(n). - Wesley Ivan Hurt, Jul 02 2014

Links

Felix Fröhlich, Table of n, a(n) for n = 1..59

Formula

a(n) = A001348(n+1) - A001348(n).

a(n) = A034785(n+1) - A034785(n). - Wesley Ivan Hurt, Jul 02 2014

Example

a(2)=24 because A001348(2)=7 and A001348(2+1)=31 then 31-7 = 24.

Maple

A139238:=n->2^ithprime(n+1)-2^ithprime(n): seq(A139238(n), n=1..20); # Wesley Ivan Hurt, Jul 02 2014

Mathematica

Table[2^Prime[n + 1] - 2^Prime[n], {n, 20}] (* Wesley Ivan Hurt, Jul 02 2014 *)

Prog

(PARI) for(n=1, 20, d=2^prime(n+1)-2^prime(n); print1(d, ", ")) \\ Felix Fröhlich, Jun 30 2014

Crossrefs

Cf. A001348, A139228, A139231, A139234, A139239, A139240, A139241, A139242, A139243.

Cf. A034785.

Sequence in context: A091143 A119920 A100738 * A139231 A052462 A260217

Adjacent sequences: A139235 A139236 A139237 * A139239 A139240 A139241

Keyword

easy,nonn

Author

Omar E. Pol, Apr 19 2008

Extensions

a(10)-a(19) from Felix Fröhlich, Jun 30 2014

Status

approved