A137551 - cp's OEIS frontend

A137551 Number of permutations in S_n avoiding {bar 2}413{bar 5} (i.e., every occurrence of 413 is contained in an occurrence of a 24135).

n	a(n)
0	1
1	1
2	2
3	5
4	14
5	43
6	144
7	525
8	2084
9	9005
10	42288
11	215111
12	1179738
13	6937765
14	43504598
15	289356385
16	2031636826
17	14995775647
18	115943399636
19	936138957225
20	7872233481696
21	68788474572625
22	623323010473012
23	5846701373312019
24	56677763478164422
25	567011396405398185

[1, 1, 2, 5, 14, 43, 144, 525, 2084, 9005, 42288, 215111, 1179738, 6937765, 43504598, 289356385, 2031636826, 14995775647, 115943399636, 936138957225, 7872233481696, 68788474572625, 623323010473012, 5846701373312019, 56677763478164422, 567011396405398185]

cp's OEIS Frontend

A137551 Number of permutations in S_n avoiding {bar 2}413{bar 5} (i.e., every occurrence of 413 is contained in an occurrence of a 24135).

Table of values

List of values