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Search: id:A132374
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| A132374 |
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Expansion of c(7x^2)/(1-xc(7x^2)), where c(x) is the g.f. of A000108 . |
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10
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OFFSET
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0,3
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COMMENT
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Hankel transform is 7^C(n+1,2) . Series reversion of x(1+x)(1+2x+8x^2) .
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FORMULA
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a(n) = Sum_{k, 0<=k<=n}A120730(n,k)*7^(n-k).
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CROSSREFS
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Cf. A000012, A001405, A126087, A128386, A121724, A128387, A121725.
Sequence in context: A015442 A110294 A110459 this_sequence A067686 A145219 A002406
Adjacent sequences: A132371 A132372 A132373 this_sequence A132375 A132376 A132377
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KEYWORD
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easy,nonn
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AUTHOR
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Philippe DELEHAM (kolotoko(AT)wanadoo.fr), Nov 10 2007
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