A249342 Position of the first occurrence of n-th noncomposite number, A008578(n), in A249337; positions of records in A249072.

1, 2, 6, 13, 20, 39, 45, 70, 80, 97, 121, 145, 193, 240, 257, 296, 322, 379, 400, 432, 481, 490, 532, 566, 632, 715, 760, 766, 807, 835, 878, 1067, 1104, 1209, 1215, 1369, 1414, 1468, 1514, 1540, 1605, 1683, 1706, 1853, 1871, 1905, 1935, 2116, 2276, 2293, 2304, 2343

Offset: 1

Author

Antti Karttunen, Oct 26 2014

Keywords

• nonn

Crossrefs

After the initial term, one less than A249341.

Cf. A008578, A249337, A249340, A249072.

Formula

For all n >= 1:

A249337(a(n)) = A008578(n).

A249072(a(n)) = n-1.

For all n >= 2:

a(n) = A249341(n) - 1.