A257646 Index of first row of triangle A103284 containing n.

0, 2, 3, 4, 4, 5, 5, 9, 5, 11, 6, 13, 6, 7, 16, 6, 18, 7, 20, 7, 22, 23, 24, 7, 26, 27, 9, 29, 7, 8, 32, 33, 34, 8, 10, 37, 38, 8, 40, 41, 42, 43, 44, 8, 46, 47, 48, 49, 9, 51, 52, 53, 8, 12, 56, 57, 58, 59, 9, 61, 62, 63, 64, 9, 13, 67, 68, 69, 70, 71, 72

Offset

1,2

Comments

a(n) <= n + 1.

Links

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

Prog

(Haskell)
import Data.List (findIndex); import Data.Maybe (fromJust)
a257646 n = fromJust $ findIndex (elem n) a103284_tabl

Crossrefs

Cf. A103284, A058084.

Sequence in context: A049987 A343397 A270832 * A051898 A092032 A058222

Adjacent sequences: A257643 A257644 A257645 * A257647 A257648 A257649

Keyword

nonn

Author

Reinhard Zumkeller, Nov 19 2015

Status

approved