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 A155728 INVERTi transform of A054765: (1, 3, 19, 160, 1744, ...). 1
 1, 2, 14, 121, 1383, 19108, 309708, 5751027, 120357325, 2803145494, 71926499002, 2016492639229, 61338391284387, 2012321446421976, 70833707268623448, 2663117961930477847, 106515148705020928105, 4516063573152118802282, 202328834841437929100838 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS This sequence convolved with A054765 prefaced with a 1: (1, 1, 3, 19, 160, ...) = (1, 3, 19, 160, ...), equivalent to row sums of triangle A155729 = A054765. LINKS Table of n, a(n) for n=1..19. FORMULA INVERTi transform of A054765 starting with offset 1: (1, 3, 19, 160, 1774, 23184, ...). EXAMPLE We write (1, 3, 19, 160, ...) in reverse: (..., 19, 3, 1), top row. Bottom row = (1, 2, ...), so that the format for a(3) = 14 becomes: ...3, 1 = A054765: (1, 3, 19, 160, ...). ..., 1, 2 for current format, take dot product = (3*1 + 1*2) = 5, then subtract from next term in A054765, getting (19 - 5) = 14. So a(3) = 14. Continuing with analogous operations, we get (1, 2, 14, 121, 1383, ...). CROSSREFS Cf. A054765, A155729. Sequence in context: A361962 A192457 A351856 * A267906 A199560 A283184 Adjacent sequences: A155725 A155726 A155727 * A155729 A155730 A155731 KEYWORD eigen,nonn AUTHOR Gary W. Adamson and Alexander R. Povolotsky, Jan 25 2009 EXTENSIONS Corrected by R. J. Mathar, Apr 04 2012 More terms from Alois P. Heinz, Mar 31 2016 STATUS approved

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Last modified June 5 22:25 EDT 2023. Contains 363138 sequences. (Running on oeis4.)