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.

A195641 Number of lower triangles of an n X n 0..5 array with all row sums equal to the length of the row and all column sums equal to the length of the column.

Table of values

n a(n)
1 1
2 1
3 3
4 19
5 391
6 25532
7 5536654
8 4102276124
9 10576325574496
10 96132191056438654
11 3112190512707436846248
12 361888107612909923618319047
13 152218183506656720143679173709254
14 233008581159686014846657554273887832751

List of values

[1, 1, 3, 19, 391, 25532, 5536654, 4102276124, 10576325574496, 96132191056438654, 3112190512707436846248, 361888107612909923618319047, 152218183506656720143679173709254, 233008581159686014846657554273887832751]

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

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