A136213 - cp's OEIS frontend

A136213 Triple factorial triangle, read by rows of 3n(n+1)/2+1 terms, where row n+1 is generated from row n by first inserting zeros in row n at positions {[m*(m+5)/6], m=0..3n-1} and then taking partial sums, starting with a '1' in row 0.

n	a(n)
0	1
1	1
2	1
3	1
4	1
5	4
6	4
7	4
8	4
9	3
10	3
11	2
12	2
13	1
14	1
15	28
16	28
17	28
18	28
19	24
20	24
21	20
22	20
23	16
24	16
25	12
26	9
27	9
28	6
29	4
30	4
31	2
32	1
33	1
34	280
35	280
36	280
37	280
38	252
39	252
40	224
41	224
42	196
43	196
44	168
45	144
46	144
47	120
48	100
49	100
50	80
51	64
52	64
53	48
54	36
55	27
56	27
57	18
58	12
59	8
60	8
61	4
62	2
63	1
64	1
65	3640
66	3640
67	3640
68	3640
69	3360

[1, 1, 1, 1, 1, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 28, 28, 28, 28, 24, 24, 20, 20, 16, 16, 12, 9, 9, 6, 4, 4, 2, 1, 1, 280, 280, 280, 280, 252, 252, 224, 224, 196, 196, 168, 144, 144, 120, 100, 100, 80, 64, 64, 48, 36, 27, 27, 18, 12, 8, 8, 4, 2, 1, 1, 3640, 3640, 3640, 3640, 3360]

cp's OEIS Frontend

A136213 Triple factorial triangle, read by rows of 3n(n+1)/2+1 terms, where row n+1 is generated from row n by first inserting zeros in row n at positions {[m*(m+5)/6], m=0..3n-1} and then taking partial sums, starting with a '1' in row 0.

Table of values

List of values