A118140 Index of A005846(n) in the primes.

13, 14, 15, 16, 18, 20, 23, 25, 30, 32, 36, 40, 45, 48, 54, 60, 65, 69, 76, 82, 89, 96, 101, 108, 116, 125, 132, 139, 147, 156, 164, 174, 184, 192, 202, 212, 220, 229, 241, 252, 283, 295, 318, 328, 342, 356, 377, 392, 407

Offset

1,1

Links

Table of n, a(n) for n=1..49.

Formula

a(n) = PrimePi(A005846(n)) = A000720( A005846(n)).

Mathematica

a = Table[PrimePi[n^2 + n + 41], {n, 0, 39}]

Crossrefs

Cf. A005846.

Sequence in context: A132580 A138596 A293831 * A108854 A106007 A048037

Adjacent sequences: A118137 A118138 A118139 * A118141 A118142 A118143

Keyword

nonn

Author

Roger L. Bagula, May 11 2006

Extensions

Offset corrected - Assoc. Eds. of the OEIS, Jun 15 2010

Status

approved