A334774 - cp's OEIS frontend

A334774 Triangle read by rows: T(n,k) is the number of permutations of 2 indistinguishable copies of 1..n with exactly k local maxima.

n	a(n)
1	1
2	3
3	3
4	9
5	57
6	24
7	27
8	705
9	1449
10	339
11	81
12	7617
13	48615
14	49695
15	7392
16	243
17	78357
18	1290234
19	3650706
20	2234643
21	230217
22	729
23	791589
24	30630618
25	197457468
26	314306943
27	128203119
28	9689934
29	2187
30	7944321
31	686779323
32	9080961729
33	30829608729
34	31435152267
35	9159564513
36	529634931

[1, 3, 3, 9, 57, 24, 27, 705, 1449, 339, 81, 7617, 48615, 49695, 7392, 243, 78357, 1290234, 3650706, 2234643, 230217, 729, 791589, 30630618, 197457468, 314306943, 128203119, 9689934, 2187, 7944321, 686779323, 9080961729, 30829608729, 31435152267, 9159564513, 529634931]

cp's OEIS Frontend

A334774 Triangle read by rows: T(n,k) is the number of permutations of 2 indistinguishable copies of 1..n with exactly k local maxima.

Table of values

List of values