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.

A289713 The order of the semigroup of orientation-preserving partial transformations on n elements.

Table of values

n a(n)
0 1
1 2
2 9
3 61
4 449
5 3161
6 21145
7 136529
8 862209
9 5369617
10 33133481
11 203119577
12 1239049729
13 7528608985
14 45596026169
15 275385806881
16 1659295498241
17 9977108934689
18 59881303252297
19 358815987469673
20 2146943650081281
21 12829239786138217
22 76571416493573849
23 456525052642949681

List of values

[1, 2, 9, 61, 449, 3161, 21145, 136529, 862209, 5369617, 33133481, 203119577, 1239049729, 7528608985, 45596026169, 275385806881, 1659295498241, 9977108934689, 59881303252297, 358815987469673, 2146943650081281, 12829239786138217, 76571416493573849, 456525052642949681]

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

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