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A110143 Row sums of triangle A110141. +0
3
1, 1, 4, 11, 43, 161, 901, 5579, 43206, 378360, 3742738, 40853520, 488029621, 6323154547, 88308425755, 1322120265238, 21122364398761, 358647945023885, 6449299885654827, 122436442904193940, 2447046870232798369 (list; graph; listen)
OFFSET

0,3

COMMENT

Row n of triangle A110141 lists the denominators of unit fraction coefficients of the products of {c_k}, in ascending order by indices of {c_k}, in the coefficient of x^n in exp(Sum_{k>=1} c_k/k*x^k). There are A000041(n) terms in row n of triangle A110141.

FORMULA

G.f.: B(x)*B(2*x^2)*B(3*x^3)*..., where B(x) is g.f. of A000142. - Vladeta Jovovic (vladeta(AT)Eunet.yu), Feb 18 2007

CROSSREFS

Cf. A110141, A000041.

Cf. A096161.

Sequence in context: A030981 A000296 A032265 this_sequence A074410 A053882 A027042

Adjacent sequences: A110140 A110141 A110142 this_sequence A110144 A110145 A110146

KEYWORD

nonn

AUTHOR

Paul D. Hanna (pauldhanna(AT)juno.com), Jul 14 2005

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.


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