A350081 - cp's OEIS frontend

A350081 Triangle read by rows: T(n,k) is the number of endofunctions on [n] whose third-smallest component has size exactly k; n >= 0, 0 <= k <= max(0,n-2).

n	a(n)
0	1
1	1
2	4
3	26
4	1
5	237
6	1
7	18
8	2789
9	31
10	135
11	170
12	40270
13	386
14	810
15	3060
16	2130
17	689450
18	6574
19	13545
20	36295
21	44730
22	32949
23	13657756
24	129291
25	327285
26	323680
27	944300
28	790776
29	604128
30	307348641
31	2910709
32	7207137
33	6602120
34	15476580
35	18780930
36	16311456
37	12782916

[1, 1, 4, 26, 1, 237, 1, 18, 2789, 31, 135, 170, 40270, 386, 810, 3060, 2130, 689450, 6574, 13545, 36295, 44730, 32949, 13657756, 129291, 327285, 323680, 944300, 790776, 604128, 307348641, 2910709, 7207137, 6602120, 15476580, 18780930, 16311456, 12782916]

cp's OEIS Frontend

A350081 Triangle read by rows: T(n,k) is the number of endofunctions on [n] whose third-smallest component has size exactly k; n >= 0, 0 <= k <= max(0,n-2).

Table of values

List of values