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A124562
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Row 2 of table A124560; also, the self-convolution square equals A124552, which is row 2 of table A124550.
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6
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1, 1, 3, 12, 63, 429, 3716, 40272, 541655, 9022405, 186233087, 4771577072, 152050410552, 6037181967007, 299176055730253, 18530408350215038, 1436276193993882859, 139462485162718679221, 16980510121067921518710
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OFFSET
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0,3
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COMMENTS
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In table A124560, the g.f. of row n, R_n(y), simultaneously satisfies: R_n(y) = Sum_{k>=0} y^k * [R_{n*k}(y)]^(n*k) for n>=0.
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LINKS
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Table of n, a(n) for n=0..18.
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FORMULA
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G.f.: A(x) = Sum_{k>=0} y^k * [R_{2k}(y)]^(2k), where R_n(x) is the g.f. of row n in table A124560.
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CROSSREFS
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Cf. A124560 (table); other rows: A124551, A124563, A124564, A124565, A124566.
Sequence in context: A020123 A186186 A135889 * A172450 A203508 A052757
Adjacent sequences: A124559 A124560 A124561 * A124563 A124564 A124565
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KEYWORD
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nonn
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AUTHOR
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Paul D. Hanna, Nov 07 2006
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STATUS
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approved
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