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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.

A277337 Number of pairs of functions (f,g) from a set of n elements into itself that are generalized reflexive inverses of each other.

Table of values

n a(n)
0 1
1 1
2 6
3 87
4 2056
5 71145
6 3355956
7 203899087
8 15451934016
9 1419181414929
10 154796303577700
11 19713331210664751
12 2891162097251141616
13 482733064744447450297
14 90871916094948544512516
15 19125402877558442317308975
16 4467829768503489097383022336
17 1151133088512781095709101702177
18 325279313240363190497696752254276

List of values

[1, 1, 6, 87, 2056, 71145, 3355956, 203899087, 15451934016, 1419181414929, 154796303577700, 19713331210664751, 2891162097251141616, 482733064744447450297, 90871916094948544512516, 19125402877558442317308975, 4467829768503489097383022336, 1151133088512781095709101702177, 325279313240363190497696752254276]

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

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