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 A257646 Index of first row of triangle A103284 containing n. 2
 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: A049987 A343397 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 June 20 10:31 EDT 2024. Contains 373516 sequences. (Running on oeis4.)