A212419 - cp's OEIS frontend

A212419 Size of the equivalence class of S_n containing the identity permutation under transformations of positionally adjacent elements of the form abc <--> acb <--> bac <--> cba, where a

n	a(n)
0	1
1	1
2	1
3	4
4	21
5	116
6	713
7	5030
8	40301
9	362852
10	3628744
11	39916716
12	479001426
13	6227020536
14	87178290639
15	1307674367142
16	20922789886141
17	355687428093140
18	6402373705721708
19	121645100408822276
20	2432902008176618342
21	51090942171709406408
22	1124000727777607604418

[1, 1, 1, 4, 21, 116, 713, 5030, 40301, 362852, 3628744, 39916716, 479001426, 6227020536, 87178290639, 1307674367142, 20922789886141, 355687428093140, 6402373705721708, 121645100408822276, 2432902008176618342, 51090942171709406408, 1124000727777607604418]

cp's OEIS Frontend

A212419 Size of the equivalence class of S_n containing the identity permutation under transformations of positionally adjacent elements of the form abc <--> acb <--> bac <--> cba, where a

Table of values

List of values