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.

A172556 Number of 2*n X 6 binary arrays with row sums 3 and column sums n.

Table of values

n a(n)
0 1
1 20
2 1860
3 297200
4 60871300
5 14367744720
6 3718394156400
7 1026608414145600
8 297348703692826500
9 89365729945562642000
10 27658131940039664137360
11 8766913970029589057611200
12 2834492178580299130305958000
13 931874436031756882451601080000
14 310768686646948895430510472680000

List of values

[1, 20, 1860, 297200, 60871300, 14367744720, 3718394156400, 1026608414145600, 297348703692826500, 89365729945562642000, 27658131940039664137360, 8766913970029589057611200, 2834492178580299130305958000, 931874436031756882451601080000, 310768686646948895430510472680000]

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

Content is available under The OEIS End-User License Agreement.