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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.

A331712 Number of nonnegative integer matrices with 3 columns and any number of distinct nonzero rows with column sums n and columns in nonincreasing lexicographic order.

Table of values

n a(n)
0 1
1 4
2 59
3 1987
4 73567
5 2451082
6 75511809
7 2339355873
8 69675164655
9 1979830442230
10 54476566524395
11 1451352437084341
12 37417988223257669
13 936855055418767566
14 22833066207602691971
15 542259452455606556087
16 12569324678636155802527
17 284784345516796080566156
18 6313245421004111720679497

List of values

[1, 4, 59, 1987, 73567, 2451082, 75511809, 2339355873, 69675164655, 1979830442230, 54476566524395, 1451352437084341, 37417988223257669, 936855055418767566, 22833066207602691971, 542259452455606556087, 12569324678636155802527, 284784345516796080566156, 6313245421004111720679497]

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

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