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A257646 Index of first row of triangle A103284 containing n. 3
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 (list; graph; refs; listen; history; text; internal format)
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: A110532 A049987 A270832 * A051898 A092032 A058222

Adjacent sequences:  A257643 A257644 A257645 * A257647 A257648 A257649

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Nov 19 2015

STATUS

approved

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Last modified September 19 14:36 EDT 2020. Contains 337178 sequences. (Running on oeis4.)