A199424 Index of first row in triangle A199333 containing n-th prime.

2, 3, 4, 4, 6, 5, 8, 9, 6, 6, 12, 7, 14, 15, 16, 7, 18, 19, 20, 9, 22, 23, 24, 25, 8, 27, 28, 8, 30, 31, 11, 33, 34, 35, 36, 9, 12, 39, 40, 41, 42, 43, 13, 45, 46, 47, 9, 10, 50, 14, 52, 53, 54, 55, 56, 57, 58, 15, 60, 61, 62, 63, 64, 65, 66, 16, 11, 69, 70

Offset: 1

Author

Reinhard Zumkeller, Nov 09 2011

Keywords

• nonn

Comments

a(n) <= n + 1.

Links

• Reinhard Zumkeller, Table of n, a(n) for n = 1..150

Crossrefs

Cf. A199425, A058084.

Programs

Haskell

import Data.List (findIndex)
import Data.Maybe (fromJust)
a199424 n = fromJust $ findIndex (elem $ a000040 n) a199333_tabl