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 A278539 a(n) = index of the column where n is located in array A278505. 6
 1, 2, 1, 3, 2, 4, 1, 5, 2, 6, 3, 7, 1, 8, 2, 9, 4, 10, 1, 11, 3, 12, 5, 13, 2, 14, 1, 15, 6, 16, 2, 17, 4, 18, 7, 19, 3, 20, 1, 21, 8, 22, 2, 23, 5, 24, 9, 25, 1, 26, 3, 27, 10, 28, 4, 29, 6, 30, 11, 31, 2, 32, 1, 33, 12, 34, 2, 35, 7, 36, 13, 37, 3, 38, 5, 39, 14, 40, 1, 41, 8, 42, 15, 43, 4, 44, 2, 45, 16, 46, 1, 47, 9, 48, 17, 49, 6, 50, 3, 51, 18, 52, 2, 53 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Ordinal transform of A278538 (as the rows of A278505 are strictly growing). LINKS Antti Karttunen, Table of n, a(n) for n = 1..10707 FORMULA a(n) = 1 + A278529(n). PROG (Scheme) (define (A278539 n) (+ 1 (A278529 n))) CROSSREFS One more than A278529. Cf. A278505, A278538, A278537. Sequence in context: A300980 A260429 A094193 * A335880 A331742 A334867 Adjacent sequences:  A278536 A278537 A278538 * A278540 A278541 A278542 KEYWORD nonn AUTHOR Antti Karttunen, Nov 23 2016 STATUS approved

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Last modified June 12 14:45 EDT 2021. Contains 344957 sequences. (Running on oeis4.)