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

1,5

Links

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

Mathematica

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

Crossrefs

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

Sequence in context: A138770 A006018 A152666 * A354408 A062867 A264027

Adjacent sequences: A153798 A153799 A153800 * A153802 A153803 A153804

Keyword

nonn

Author

Omar E. Pol, Jan 13 2009

Extensions

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

More terms from Jinyuan Wang, Mar 02 2020

Status

approved