A238248 Numbers m such that A072219(m) = 7.

43, 75, 83, 85, 86, 87, 91, 107, 139, 147, 149, 150, 151, 155, 163, 165, 166, 167, 169, 170, 172, 173, 174, 175, 179, 181, 182, 183, 187, 203, 211, 213, 214, 215, 219, 235, 267, 275, 277, 278, 279, 283, 291, 293, 294, 295, 297, 298, 300, 301, 302, 303, 307

Offset: 1

Author

Reinhard Zumkeller, Feb 20 2014

Keywords

• nonn

Comments

a(n) = A043689(n) + 1.

Links

• Reinhard Zumkeller, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A000079, A238246, A238247.

Programs

Haskell

a238248 n = a238248_list !! (n-1)
a238248_list = filter ((== 7) . a072219) [1..]