A091940 - cp's OEIS frontend

A091940 Given n colors, sequence gives number of ways to color the vertices of a square such that no edge has the same color on both of its vertices.

n	a(n)
1	0
2	2
3	18
4	84
5	260
6	630
7	1302
8	2408
9	4104
10	6570
11	10010
12	14652
13	20748
14	28574
15	38430
16	50640
17	65552
18	83538
19	104994
20	130340
21	160020
22	194502
23	234278
24	279864
25	331800
26	390650
27	457002
28	531468
29	614684
30	707310
31	810030
32	923552
33	1048608
34	1185954
35	1336370
36	1500660

[0, 2, 18, 84, 260, 630, 1302, 2408, 4104, 6570, 10010, 14652, 20748, 28574, 38430, 50640, 65552, 83538, 104994, 130340, 160020, 194502, 234278, 279864, 331800, 390650, 457002, 531468, 614684, 707310, 810030, 923552, 1048608, 1185954, 1336370, 1500660]

cp's OEIS Frontend

A091940 Given n colors, sequence gives number of ways to color the vertices of a square such that no edge has the same color on both of its vertices.

Table of values

List of values