A107623 Primes plus alternately 3 and 2.

5, 5, 8, 9, 14, 15, 20, 21, 26, 31, 34, 39, 44, 45, 50, 55, 62, 63, 70, 73, 76, 81, 86, 91, 100, 103, 106, 109, 112, 115, 130, 133, 140, 141, 152, 153, 160, 165, 170, 175, 182, 183, 194, 195, 200, 201, 214, 225, 230, 231, 236, 241, 244, 253, 260, 265, 272, 273

Offset

1,1

Links

Table of n, a(n) for n=1..58.

Formula

A107623(n) = prime(n) + (2 + mod(n, 2)).

Mathematica

A107623[n_]:= Prime[n] + (2 + Mod[n, 2])

Crossrefs

Cf. A107620, A107621, 107622.

Sequence in context: A141538 A358257 A003861 * A218333 A212533 A081287

Adjacent sequences: A107620 A107621 A107622 * A107624 A107625 A107626

Keyword

easy,nonn

Author

Zak Seidov, May 18 2005

Status

approved