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.

A133047 Starting from the standard 12 against 12 starting position in checkers, the sequence gives the number of distinct positions that can arise after n moves.

Table of values

n a(n)
0 1
1 7
2 49
3 216
4 805
5 2733
6 9105
7 28123
8 85340
9 255800
10 768155
11 2265062
12 6588759
13 18667410
14 51448497
15 137051636
16 353575584
17 878804335
18 2113497469
19 4908984819
20 11049271004
21 24062242901
22 50742319631

List of values

[1, 7, 49, 216, 805, 2733, 9105, 28123, 85340, 255800, 768155, 2265062, 6588759, 18667410, 51448497, 137051636, 353575584, 878804335, 2113497469, 4908984819, 11049271004, 24062242901, 50742319631]