A139235 First differences of even superperfect numbers A061652, divided by 2.

1, 6, 24, 2016, 30720, 98304, 536739840, 576460751766552576, 154742504334211782058967040, 40564664464798430175360140181504, 42535255300298100629580978034468454400

Offset: 1

Author

Omar E. Pol, Apr 18 2008

Keywords

• nonn

Comments

First differences of Mersenne primes A000668, divided by 4 (see A139231).

Also, first differences of superperfect numbers A019279, divided by 2, if there are no odd superperfect numbers.

Links

• Paolo Xausa, Table of n, a(n) for n = 1..17

Crossrefs

Cf. A000668, A019279, A061652, A139228, A139229, A139230, A139231, A139232, A139233, A139234, A139236, A139237.

Programs

Mathematica

Differences[2^MersennePrimeExponent[Range[14]]-1]/4 (* Paolo Xausa, Oct 20 2023 *)

Formula

a(n) = A139234(n)/2.

Extensions

a(8)-a(11) from Jinyuan Wang, Mar 04 2020