A153801 Index of Mersenne number A000225 that is also Mersenne prime A000668, minus n-th prime: a(n) = A000043(n) - A000040(n).

0, 0, 0, 0, 2, 4, 2, 12, 38, 60, 76, 90, 480, 564, 1232, 2150, 2222, 3156, 4186, 4352, 9616, 9862, 11130, 19848, 21604, 23108, 44394, 86136, 110394, 131936, 215964, 756708, 859296, 1257648, 1398120, 2976070, 3021220, 6972430, 13466750, 20995838, 24036404, 25964770

Offset: 1

Author

Omar E. Pol, Jan 13 2009

Keywords

• nonn

Links

• Amiram Eldar, Table of n, a(n) for n = 1..48

Crossrefs

Cf. A000040, A000043, A000668, A000225, A000396, A007691, A153800, A153802, A153803.

Programs

Mathematica

With[{max = 48}, MersennePrimeExponent[Range[max]] - Prime[Range[max]]] (* Amiram Eldar, Oct 21 2024 *)

Extensions

More terms from R. J. Mathar, Feb 19 2009

More terms from Jinyuan Wang, Mar 02 2020