A326374 - cp's OEIS frontend

A326374 Irregular triangle read by rows where T(n,k) is the number of (d + 1)-uniform hypertrees spanning n + 1 vertices, where d = A027750(n,k).

n	a(n)
1	1
2	3
3	1
4	16
5	1
6	125
7	15
8	1
9	1296
10	1
11	16807
12	735
13	140
14	1
15	262144
16	1
17	4782969
18	76545
19	1890
20	1
21	100000000
22	112000
23	1
24	2357947691
25	13835745
26	33264
27	1
28	61917364224
29	1
30	1792160394037
31	3859590735
32	270670400
33	35135100
34	720720
35	1
36	56693912375296
37	1
38	1946195068359375

[1, 3, 1, 16, 1, 125, 15, 1, 1296, 1, 16807, 735, 140, 1, 262144, 1, 4782969, 76545, 1890, 1, 100000000, 112000, 1, 2357947691, 13835745, 33264, 1, 61917364224, 1, 1792160394037, 3859590735, 270670400, 35135100, 720720, 1, 56693912375296, 1, 1946195068359375]

cp's OEIS Frontend

A326374 Irregular triangle read by rows where T(n,k) is the number of (d + 1)-uniform hypertrees spanning n + 1 vertices, where d = A027750(n,k).

Table of values

List of values