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.

A259101 Square array read by antidiagonals arising in the enumeration of corners.

Table of values

n a(n)
0 1
1 2
2 2
3 5
4 16
5 5
6 14
7 91
8 91
9 14
10 42
11 456
12 936
13 456
14 42
15 132
16 2145
17 7425
18 7425
19 2145
20 132
21 429
22 9724
23 50765
24 85800
25 50765
26 9724
27 429
28 1430
29 43043
30 315315
31 805805
32 805805
33 315315
34 43043
35 1430
36 4862
37 187408
38 1831648
39 6584032
40 9962680
41 6584032
42 1831648
43 187408
44 4862
45 16796
46 806208
47 10127988
48 48674808
49 103698504
50 103698504
51 48674808
52 10127988
53 806208
54 16796

List of values

[1, 2, 2, 5, 16, 5, 14, 91, 91, 14, 42, 456, 936, 456, 42, 132, 2145, 7425, 7425, 2145, 132, 429, 9724, 50765, 85800, 50765, 9724, 429, 1430, 43043, 315315, 805805, 805805, 315315, 43043, 1430, 4862, 187408, 1831648, 6584032, 9962680, 6584032, 1831648, 187408, 4862, 16796, 806208, 10127988, 48674808, 103698504, 103698504, 48674808, 10127988, 806208, 16796]

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

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