A256563 Indices of semiprimes in A166133.

3, 7, 12, 11, 15, 14, 17, 24, 29, 28, 36, 35, 34, 31, 30, 47, 50, 52, 56, 58, 59, 63, 66, 25, 77, 74, 92, 89, 102, 101, 109, 107, 106, 105, 83, 116, 128, 125, 124, 143, 142, 141, 135, 131, 147, 154, 155, 156, 103, 171, 99, 96, 95, 145, 189, 259, 178, 177

Offset: 1

Author

Reinhard Zumkeller, Apr 02 2015

Keywords

• nonn

Links

• Reinhard Zumkeller and Ray Chandler, Table of n, a(n) for n = 1..10000 (first 1000 terms from Reinhard Zumkeller)

Crossrefs

Cf. A166133, A256561, A255833, A001358.

Programs

Haskell

a256563 = (+ 1) . fromJust . (`elemIndex` a166133_list) . a001358

Formula

a(n) = A255833(A001358(n)). - Ray Chandler, Apr 14 2015