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.

A005631 Bishops on a 2n+1 X 2n+1 board (see Robinson paper for details).

Table of values

n a(n)
0 1
1 2
2 6
3 18
4 60
5 200
6 760
7 2888
8 11856
9 48672
10 215904
11 957728
12 4506304
13 21203072
14 105494400
15 524880000
16 2737670400
17 14279148032
18 77836363264
19 424289980928
20 2405307227136
21 13635728197632
22 80188215392256
23 471566299547648
24 2867649768509440
25 17438513317683200

List of values

[1, 2, 6, 18, 60, 200, 760, 2888, 11856, 48672, 215904, 957728, 4506304, 21203072, 105494400, 524880000, 2737670400, 14279148032, 77836363264, 424289980928, 2405307227136, 13635728197632, 80188215392256, 471566299547648, 2867649768509440, 17438513317683200]

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

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