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 A161920 a(n) = A161511(A004760(n)). 2
 1, 2, 4, 3, 6, 5, 6, 4, 8, 7, 8, 6, 9, 7, 8, 5, 10, 9, 10, 8, 11, 9, 10, 7, 12, 10, 11, 8, 12, 9, 10, 6, 12, 11, 12, 10, 13, 11, 12, 9, 14, 12, 13, 10, 14, 11, 12, 8, 15, 13, 14, 11, 15, 12, 13, 9, 16, 13, 14, 10, 15, 11, 12, 7, 14, 13, 14, 12, 15, 13, 14, 11, 16, 14, 15, 12, 16 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS a(n) gives the one-based position of the first nonzero term on the row n-1 of A126441. Sequence A016116 can be used to identify the extracted subsequence by computing the number of terms to alternately extract and skip. [This comment is from the original submitter. I don't understand it. - Antti Karttunen, Oct 12 2009] LINKS CROSSREFS a(n) = A161511(A004760(n)) = 1 + A055941(n-1) + A029837(n). Sequence in context: A182298 A182732 A119477 * A278512 A278511 A255552 Adjacent sequences:  A161917 A161918 A161919 * A161921 A161922 A161923 KEYWORD nonn AUTHOR Alford Arnold, Jun 24 2009 EXTENSIONS Edited and extended by Antti Karttunen, Oct 12 2009 STATUS approved

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Last modified June 21 02:05 EDT 2021. Contains 345342 sequences. (Running on oeis4.)