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.

A188405 Number of (4*n) X n binary arrays with rows in nonincreasing order, 4 ones in every column and no more than 2 ones in any row.

Table of values

n a(n)
0 1
1 1
2 5
3 42
4 641
5 14751
6 478711
7 20758650
8 1158207312
9 80758709676
10 6877184737416
11 701994697409136
12 84574042067524470
13 11870290445670605262
14 1919446717950100963626
15 354168049679464581788796
16 73947210994621695613727526
17 17342441149450781813176059990

List of values

[1, 1, 5, 42, 641, 14751, 478711, 20758650, 1158207312, 80758709676, 6877184737416, 701994697409136, 84574042067524470, 11870290445670605262, 1919446717950100963626, 354168049679464581788796, 73947210994621695613727526, 17342441149450781813176059990]

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

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