A238246 Numbers m such that A072219(m) = 3.

3, 5, 6, 7, 9, 10, 12, 13, 14, 15, 17, 18, 20, 24, 25, 26, 28, 29, 30, 31, 33, 34, 36, 40, 48, 49, 50, 52, 56, 57, 58, 60, 61, 62, 63, 65, 66, 68, 72, 80, 96, 97, 98, 100, 104, 112, 113, 114, 116, 120, 121, 122, 124, 125, 126, 127, 129, 130, 132, 136, 144

Offset: 1

Author

Reinhard Zumkeller, Feb 20 2014

Keywords

• nonn

Comments

a(n) = A043687(n) + 1.

Links

• Reinhard Zumkeller, Table of n, a(n) for n = 1..1000

Crossrefs

Cf. A000079, A238247, A238248.

Programs

Haskell

a238246 n = a238246_list !! (n-1)
a238246_list = filter ((== 3) . a072219) [1..]