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A264856 Index of first row of triangle A125605 containing n. 2
0, 2, 3, 4, 5, 6, 7, 6, 9, 10, 11, 8, 11, 10, 15, 16, 17, 18, 14, 12, 15, 22, 12, 18, 12, 22, 27, 18, 13, 20, 15, 32, 33, 34, 13, 36, 37, 14, 15, 14, 38, 42, 43, 44, 45, 16, 24, 13, 25, 50, 51, 52, 53, 54, 31, 56, 45, 58, 59, 60, 19, 62, 63, 64, 65, 66, 67 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

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

PROG

(Haskell)

import Data.List (findIndex); import Data.Maybe (fromJust)

a264856 n = fromJust $ findIndex (elem n) a125605_tabl

CROSSREFS

Cf. A125605, A058084.

Sequence in context: A331303 A161658 A066853 * A141258 A117656 A101918

Adjacent sequences:  A264853 A264854 A264855 * A264857 A264858 A264859

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Nov 26 2015

STATUS

approved

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Last modified January 22 19:16 EST 2020. Contains 331153 sequences. (Running on oeis4.)