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 A134199 A002260 + A134082 - I as infinite lower triangular matrices; I = Identity matrix. 1
 1, 3, 2, 1, 6, 3, 1, 2, 9, 4, 1, 2, 3, 12, 5, 1, 2, 3, 4, 15, 6, 1, 2, 3, 4, 5, 18, 7, 1, 2, 3, 4, 5, 6, 21, 8, 1, 2, 3, 4, 5, 6, 7, 24, 9, 1, 2, 3, 4, 5, 6, 7, 8, 27, 10 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 COMMENTS Row sums = A052905: (1, 5, 10, 16, 23, 31, 40, ...). LINKS Table of n, a(n) for n=0..54. EXAMPLE First few rows of the triangle: 1; 3, 2; 1, 6, 3; 1, 2, 9, 4; 1, 2, 3, 12, 5; 1, 2, 3, 4, 15, 6; 1, 2, 3, 4, 5, 18, 7; ... CROSSREFS Cf. A002260, A134082, A052905. Sequence in context: A089145 A324644 A361470 * A323417 A102189 A031252 Adjacent sequences: A134196 A134197 A134198 * A134200 A134201 A134202 KEYWORD nonn,tabl AUTHOR Gary W. Adamson, Oct 13 2007 STATUS approved

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Last modified May 31 23:42 EDT 2023. Contains 363068 sequences. (Running on oeis4.)