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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.

A139674 Number of n X n symmetric binary matrices with all row sums 7.

Table of values

n a(n)
7 1
8 764
9 708256
10 805036704
11 1127512146540
12 1966499966796816
13 4274712091685443584
14 11528251571501588791296
15 38295413179145036856212700
16 155411811543624388078758718000
17 763997249847515085736557734880512
18 4511824317564827934662170498445281792

List of values

[1, 764, 708256, 805036704, 1127512146540, 1966499966796816, 4274712091685443584, 11528251571501588791296, 38295413179145036856212700, 155411811543624388078758718000, 763997249847515085736557734880512, 4511824317564827934662170498445281792]

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

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