A173137 - OEIS

A173137

n-th nonnegative noncomposite number plus n.

1, 3, 5, 7, 10, 13, 18, 21, 26, 29, 34, 41, 44, 51, 56, 59, 64, 71, 78, 81, 88, 93, 96, 103, 108, 115, 124, 129, 132, 137, 140, 145, 160, 165, 172, 175, 186, 189, 196, 203, 208, 215, 222, 225, 236, 239, 244, 247, 260, 273, 278, 281, 286, 293, 296, 307, 314, 321

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

LINKS

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

FORMULA

a(n) = A158611(n) + A000027(n).

EXAMPLE

a(1) = 0 + 1 = 1, a(2) = 1 + 2 = 3, a(3) = 2 + 3 = 5,

a(4) = 3 + 4 = 7, a(5) = 5 + 5 = 10.

MATHEMATICA

Join[{1}, Table[Prime[n - 1] + n + 1, {n, 2, 60}]] (* Vincenzo Librandi, Dec 08 2015 *)