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.

Showing 1-3 of 3 results.

A144882 Row sums of triangle A144881 (S1hat(3)) and of array A144880 (M31hat(3)).

Original entry on oeis.org

1, 4, 16, 85, 481, 3352, 25420, 223393, 2157565, 23241244, 272933680, 3496821133, 48307202761, 717473918560, 11381186498836, 192155770419673, 3438337498017781, 65004294514876996, 1294456866053992600, 27081588485949257605
Offset: 1

Views

Author

Wolfdieter Lang, Oct 09 2008

Keywords

Crossrefs

Cf. A144880, A144881.

Formula

a(n) = Sum_{m=1..n} A144881(n,m), n>=1.

A144883 Second column (m=2) of triangle A144881 (S1hat(3)).

Original entry on oeis.org

1, 3, 21, 96, 684, 4320, 35640, 293760, 2881440, 29695680, 345643200, 4296499200, 58518028800, 851751936000, 13338801100800, 222145265664000, 3934764739584000, 73675580977152000, 1455693852146688000, 30238671742304256000, 659012259039805440000
Offset: 0

Views

Author

Wolfdieter Lang, Oct 09 2008

Keywords

Crossrefs

Cf. A144881, A001710 (first column), A144884 (third column).

Formula

a(n) = A144881(n+2,2), n>=0.

A144884 Third column (m=3) of triangle A144881 (S1hat(3)).

Original entry on oeis.org

1, 3, 21, 123, 792, 5292, 42768, 348840, 3313440, 33734880, 382423680, 4683303360, 62795865600, 903908678400, 14018003596800, 231803919244800, 4081121327001600, 76062618390528000, 1497060883196928000, 31001124301830144000, 673857550403702784000
Offset: 0

Views

Author

Wolfdieter Lang, Oct 09 2008

Keywords

Crossrefs

Cf. A144881, A144883 (second column).

Formula

a(n) = A144881(n+3,3), n>=0.
Showing 1-3 of 3 results.

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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