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 A176202 Convolution triangle, row sums = A000041. M = A000041 in each column with two interleaved zeros; Q = A000726 diagonalized with the rest zeros. A176202 = M*Q. 3
 1, 0, 1, 0, 0, 2, 1, 0, 0, 2, 0, 1, 0, 0, 4, 0, 0, 2, 0, 0, 5, 2, 0, 0, 2, 0, 0, 7, 0, 2, 0, 0, 4, 0, 0, 9, 0, 0, 4, 0, 0, 5, 0, 0, 13, 3, 0, 0, 4, 0, 0, 7, 0, 0, 16, 0, 3, 0, 0, 8, 0, 0, 9, 0, 0, 22, 0, 0, 6, 0, 0, 10, 0, 0, 13, 0, 0, 27 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 0,6 COMMENTS Row sums = A000041 LINKS FORMULA Let M = an infinite lower triangular matrix with A000041 interleaved with two zeros in each column. Q = A000726 diagonalized, with the rest zeros. A176202 = M*Q EXAMPLE First few rows of the triangle = 1; 0, 1; 0, 0, 2; 1, 0, 0, 2; 0, 1, 0, 0, 4; 0, 0, 2, 0, 0, 5; 2, 0, 0, 2, 0, 0, 7; 0, 2, 0, 0, 4, 0, 0, 9; 0, 0, 4, 0, 0, 5, 0, 0, 13; 3, 0, 0, 4, 0, 0, 7, 0, 0, 16; 0, 3, 0, 0, 8, 0, 0, 9, 0, 0, 22; 0, 0, 6, 0, 0, 10, 0, 0, 13, 0, 0, 27; 5, 0, 0, 6, 0, 0, 14, 0, 0, 16, 0, 0, 36; 0, 5, 0, 0, 12, 0, 0, 18, 0, 0, 22, 0, 0, 44; 0, 0, 10, 0, 0, 15, 0, 0, 26, 0, 0, 27, 0, 0, 57; 7, 0, 0, 10, 0, 0, 21, 0, 0, 32, 0, 0, 36, 0, 0, 70; 0, 7, 0, 0, 20, 0, 0, 27, 0, 0, 44, 0, 0, 44, 0, 0, 89; 0, 0, 14, 0, 0, 25, 0, 0, 39, 0, 0, 54, 0, 0, 57, 0, 0, 108; 11, 0, 0, 14, 0, 0, 35, 0, 0, 48, 0, 0, 72, 0, 0, 70, 0, 0, 135; ... CROSSREFS Cf. A000041, A000726, A113685, A174714 Sequence in context: A155103 A295819 A048105 * A040081 A239393 A256637 Adjacent sequences:  A176199 A176200 A176201 * A176203 A176204 A176205 KEYWORD nonn,tabl AUTHOR Gary W. Adamson, Apr 11 2010 STATUS approved

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Last modified October 18 04:09 EDT 2018. Contains 316304 sequences. (Running on oeis4.)