A368299 - cp's OEIS frontend

A368299 a(n) is the number of permutations pi of [n] that avoid {231,321} so that pi^4 avoids 132.

n	a(n)
0	0
1	1
2	2
3	4
4	7
5	13
6	23
7	41
8	72
9	127
10	223
11	392
12	688
13	1208
14	2120
15	3721
16	6530
17	11460
18	20111
19	35293
20	61935
21	108689
22	190736
23	334719
24	587391
25	1030800
26	1808928
27	3174448
28	5570768
29	9776017
30	17155714
31	30106180
32	52832663
33	92714861
34	162703239
35	285524281
36	501060184
37	879299327

[0, 1, 2, 4, 7, 13, 23, 41, 72, 127, 223, 392, 688, 1208, 2120, 3721, 6530, 11460, 20111, 35293, 61935, 108689, 190736, 334719, 587391, 1030800, 1808928, 3174448, 5570768, 9776017, 17155714, 30106180, 52832663, 92714861, 162703239, 285524281, 501060184, 879299327]

cp's OEIS Frontend

A368299 a(n) is the number of permutations pi of [n] that avoid {231,321} so that pi^4 avoids 132.

Table of values

List of values