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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.

A140713 Triangle read by rows: T(n,k) is the number of white corners of rank k in all the permutations of {1,2,...,n} (n>=2, 0<=k<=n-2; for definitions see the Eriksson-Linusson references).

Table of values

n a(n)
2 1
3 5
4 1
5 26
6 9
7 2
8 154
9 70
10 26
11 6
12 1044
13 562
14 268
15 102
16 24
17 8028
18 4860
19 2700
20 1308
21 504
22 120
23 69264
24 45756
25 28224
26 15828
27 7728
28 3000
29 720

List of values

[1, 5, 1, 26, 9, 2, 154, 70, 26, 6, 1044, 562, 268, 102, 24, 8028, 4860, 2700, 1308, 504, 120, 69264, 45756, 28224, 15828, 7728, 3000, 720]

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

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