A231386 - cp's OEIS frontend

A231386 Number of permutations of [n] with exactly one occurrence of one of the consecutive step patterns UUD, UDU, DUU (U=up, D=down).

n	a(n)
0	0
1	0
2	0
3	0
4	11
5	52
6	233
7	1344
8	8197
9	49846
10	351946
11	2799536
12	22764021
13	200196218
14	1947350444
15	19753229932
16	210793513246
17	2425636703848
18	29307938173409
19	369141523106550
20	4920501544208343
21	68771635812423192
22	998694091849893095
23	15169308298544690802

[0, 0, 0, 0, 11, 52, 233, 1344, 8197, 49846, 351946, 2799536, 22764021, 200196218, 1947350444, 19753229932, 210793513246, 2425636703848, 29307938173409, 369141523106550, 4920501544208343, 68771635812423192, 998694091849893095, 15169308298544690802]

cp's OEIS Frontend

A231386 Number of permutations of [n] with exactly one occurrence of one of the consecutive step patterns UUD, UDU, DUU (U=up, D=down).

Table of values

List of values