A037127 a(n) = nextprime(3^n) - 2^n.

1, 3, 7, 21, 67, 219, 669, 2075, 6307, 19175, 58027, 175119, 527361, 1586139, 4766587, 14316141, 42981211, 129009125, 387158355, 1161737235, 3485735833, 10458256107, 31376865309, 94134790251, 282412759267, 847255055025, 2541798719467, 7625463267275

Offset

0,2

Links

Table of n, a(n) for n=0..27.

Formula

a(n) = A151800(A000244(n)) - A000079(n). - Alois P. Heinz, Dec 09 2020

Crossrefs

Cf. A000079, A000244, A151800.

Sequence in context: A097147 A148677 A240506 * A105795 A322459 A244174

Adjacent sequences: A037124 A037125 A037126 * A037128 A037129 A037130

Keyword

nonn

Author

N. J. A. Sloane.

Extensions

More terms from Sean A. Irvine, Dec 09 2020

Status

approved