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.

A333739 Number of n X n nonnegative integer symmetric matrices with all row and column sums equal to n.

Table of values

n a(n)
0 1
1 1
2 3
3 23
4 641
5 62781
6 22393101
7 29445929253
8 144413237202513
9 2664174112921403401
10 186127457781265060985293
11 49509854244685925218197355989
12 50364892612276937755557718571828543
13 196663809308382999799947201118326883990475

List of values

[1, 1, 3, 23, 641, 62781, 22393101, 29445929253, 144413237202513, 2664174112921403401, 186127457781265060985293, 49509854244685925218197355989, 50364892612276937755557718571828543, 196663809308382999799947201118326883990475]

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

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