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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.

A278844 a(n) = permanent M_n where M_n is the n X n matrix m(i,j) = (Catalan(i+j))^2.

Table of values

n a(n)
0 1
1 4
2 1409
3 61813936
4 405546824579185
5 444429790193462299152820
6 87560380592182813232163111416947497
7 3267701159348966740482726536189228228570094452288
8 24017165813923278639658993746183865352216465064857235206429739929

List of values

[1, 4, 1409, 61813936, 405546824579185, 444429790193462299152820, 87560380592182813232163111416947497, 3267701159348966740482726536189228228570094452288, 24017165813923278639658993746183865352216465064857235206429739929]

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

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