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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A089471 Equals the self-convolution of A089470 and also the hyperbinomial transform of A089470.

Original entry on oeis.org

1, 2, 9, 66, 680, 9054, 147811, 2855574, 63656423, 1607072112, 45294892304, 1409197189256, 47954491442089, 1771493331491354, 70590010219153189, 3017771375030039066, 137763757493141082536, 6688261925293875095950
Offset: 0

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Author

Paul D. Hanna, Nov 07 2003

Keywords

Comments

See A088956 for the definition of the hyperbinomial transform.

Examples

			The self-convolution of A089470 at n=4: a(4) = 680 = 303*1+29*1+4*4+1*29+1*303 and equals the hyperbinomial transform of A089470 at n=4: a(4) = 680 = 125*1+64*1+18*4+4*29+1*303.

Crossrefs

Cf. A089470, A088956.

Formula

a(n) = sum(k=1, n, A089470(k)*A089470(n-k)); a(n) = sum(k=0, n, (n-k+1)^(n-k-1)*binomial(n, k)*A089470(k)).
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Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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