A317446 - cp's OEIS frontend

A317446 Number of permutations of [n] whose lengths of increasing runs are distinct triangular numbers.

n	a(n)
0	1
1	1
2	0
3	1
4	6
5	0
6	1
7	12
8	0
9	166
10	3687
11	20
12	0
13	570
14	18514
15	1
16	16044
17	689458
18	1630
19	46150176
20	2799527248
21	108527
22	6182180
23	0
24	653209572
25	50529806020
26	457774882
27	592018
28	64091958837
29	5934158290988
30	7151183666
31	15132424235658
32	1574449800015044
33	0
34	342747690810188908

[1, 1, 0, 1, 6, 0, 1, 12, 0, 166, 3687, 20, 0, 570, 18514, 1, 16044, 689458, 1630, 46150176, 2799527248, 108527, 6182180, 0, 653209572, 50529806020, 457774882, 592018, 64091958837, 5934158290988, 7151183666, 15132424235658, 1574449800015044, 0, 342747690810188908]

cp's OEIS Frontend

A317446 Number of permutations of [n] whose lengths of increasing runs are distinct triangular numbers.

Table of values

List of values