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 A261646 Row lengths in A261644. 5
 1, 1, 1, 3, 5, 7, 15, 27, 49, 90, 171, 326, 613, 1174, 2255, 4333, 8386, 16213, 31457, 61097, 118577, 230322, 447767, 870570, 1693887, 3297343, 6423347, 12523562, 24435171, 47707012, 93215393, 182260604, 356622869, 698284551, 1368195878, 2682527954, 5262729874, 10330704931 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,4 COMMENTS First differences of A261396; also row lengths in A261712. LINKS Table of n, a(n) for n=1..38. FORMULA a(n) = A261396(n) - A261396(n-1). PROG (Haskell) a261646 = length . a261644_row CROSSREFS Cf. A261644, A261712, A261396. Sequence in context: A166093 A165785 A362057 * A303027 A217615 A334084 Adjacent sequences: A261643 A261644 A261645 * A261647 A261648 A261649 KEYWORD nonn AUTHOR Reinhard Zumkeller, Aug 31 2015 EXTENSIONS a(21)-a(38) from Chai Wah Wu, Aug 31 2015 STATUS approved

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Last modified August 9 21:21 EDT 2024. Contains 375044 sequences. (Running on oeis4.)