A111280 - cp's OEIS frontend

A111280 Number of permutations avoiding the patterns {4231, 4321, 35142, 45312, 42513, 45132, 35412, 45213, 43512, 456123, 351624, 451623, 356124}; number of strong sorting class based on 4231.

n	a(n)
0	1
1	1
2	2
3	6
4	22
5	113
6	431
7	1584
8	5920
9	22214
10	83239
11	311777
12	1167902
13	4375090
14	16389450
15	61395989
16	229993639
17	861572476
18	3227511492
19	12090486122
20	45291815419
21	169666341761
22	635582108218
23	2380935499534
24	8919152662622
25	33411776268873

[1, 1, 2, 6, 22, 113, 431, 1584, 5920, 22214, 83239, 311777, 1167902, 4375090, 16389450, 61395989, 229993639, 861572476, 3227511492, 12090486122, 45291815419, 169666341761, 635582108218, 2380935499534, 8919152662622, 33411776268873]

cp's OEIS Frontend

A111280 Number of permutations avoiding the patterns {4231, 4321, 35142, 45312, 42513, 45132, 35412, 45213, 43512, 456123, 351624, 451623, 356124}; number of strong sorting class based on 4231.

Table of values

List of values