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 1-2 of 2 results.

A178886 Divide, cell by cell, sequence A178802 by sequence A178888.

Original entry on oeis.org

1, 1, 1, 2, 2, 1, 6, 4, 2, 3, 1, 24, 12, 12, 6, 6, 4, 1, 120, 48, 48, 24, 18, 36, 6, 8, 12, 5, 1, 720, 240, 240, 240, 72, 144, 72, 72, 24, 72, 24, 10, 20, 6, 1, 5040, 1440, 1440, 1440, 720, 360
Offset: 1

Views

Author

Alford Arnold, Jun 21 2010

Keywords

Comments

Sequences A178802, A178888 and A178886 have A000041(n) entries per row.

Examples

			A178802 begins 1 2 2 6 12 6 24 48 24 72 24 ...
A178888 begins 1 2 2 3 6 6 4 12 12 24 24 ...
therefore
A178886 begins 1 1 1 2 2 1 6 4 2 3 1 ...

Crossrefs

Cf. A000041, A000522 (row sums), A002866, A178802, A178887, A178888.

Formula

T(n,k) = A178802(n,k) / A178888(n,k)

A179235 Row sums of the irregular triangle A179236.

Original entry on oeis.org

1, 4, 48, 744, 17640, 647280, 29116080
Offset: 1

Views

Author

Alford Arnold, Jul 04 2010

Keywords

Comments

The approach used to generate A179235 and A179236 can also be used for A178802 and A049009.

Examples

			A179236 begins
1;
2,2;
6,36,6;
24,192,72,432,24;
120,1200,2400,3600,5400,4800,120;
so this sequence begins 1,4,48,...

Crossrefs

Cf. A049009, A178802

Extensions

Two more terms from R. J. Mathar, Oct 29 2011
Showing 1-2 of 2 results.

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