cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

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A116870 Seventh column of triangle A028364.

Original entry on oeis.org

429, 1001, 3003, 9646, 32123, 109550, 380162, 1337220, 4755402, 17065365, 61714147, 224661206, 822574599, 3027096930, 11190101910, 41532876060, 154712622870, 578210935770, 2167431271614, 8146882131276
Offset: 0

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Author

Wolfdieter Lang, Mar 24 2006

Keywords

Comments

Also seventh diagonal of triangle A067323.

Crossrefs

Cf. A000108, A028364, A067323, A116869 (sixth column).

Formula

a(n) = A028364(n+6,6) = Sum_{k=0..6} C(k)*C(n+6-k), with the Catalan numbers C(n):=A000108(n).
G.f.: (c6(x)*c(x)-(c6(x)-1)/x)/x^6, with c6(x) := Sum_{k=0..6} C(k)*x^k and c(x) is the g.f. for the Catalan numbers A000108.
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Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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