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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.

A331707 Number of nonnegative integer matrices with 3 distinct columns and any number of distinct nonzero rows with column sums n and columns in decreasing lexicographic order.

Table of values

n a(n)
0 0
1 1
2 46
3 1900
4 73028
5 2448599
6 75497242
7 2339274204
8 69674762468
9 1979828352817
10 54476556180342
11 1451352388018928
12 37417987990316376
13 936855054326483475
14 22833066202591181758
15 542259452432969505704
16 12569324678536063256324
17 284784345516356806067001
18 6313245421002223574950650

List of values

[0, 1, 46, 1900, 73028, 2448599, 75497242, 2339274204, 69674762468, 1979828352817, 54476556180342, 1451352388018928, 37417987990316376, 936855054326483475, 22833066202591181758, 542259452432969505704, 12569324678536063256324, 284784345516356806067001, 6313245421002223574950650]

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

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