A249340 Position of the first occurrence of n-th noncomposite number, A008578(n), in A249336; positions of records in A249338.

1, 3, 5, 13, 20, 39, 50, 70, 80, 97, 131, 142, 193, 240, 257, 296, 322, 379, 397, 435, 478, 490, 542, 569, 629, 736, 758, 764, 828, 835, 872, 1067, 1100, 1209, 1214, 1369, 1414, 1468, 1514, 1549, 1606, 1681, 1700, 1853, 1871, 1903, 1931, 2116, 2244, 2293, 2303, 2343

Offset: 1

Author

Antti Karttunen, Oct 26 2014

Keywords

• nonn

Crossrefs

Cf. A249336, A249338, A249339.

Formula

a(n) = A249339(n+1) - 1.

Other identities. For all n >= 1:

A249336(a(n)) = A008578(n).

A249338(a(n)) = n-1.