A301390 - cp's OEIS frontend

A301390 The number of n X k matrices, k=0..n, with nonnegative integer entries and every row and column sum <=3 . Triangle T(n>=0, 0<=k<=n) read by rows.

n	a(n)
0	1
1	1
2	4
3	1
4	10
5	70
6	1
7	20
8	316
9	3380
10	1
11	35
12	1045
13	23259
14	344279
15	1
16	56
17	2806
18	112976
19	3286101
20	63241196
21	1
22	84
23	6510
24	427440
25	21787375
26	789333776
27	18937075894
28	1
29	120
30	13560
31	1347676
32	109770025
33	6797996276
34	296755137820
35	8610006123300
36	1
37	165
38	26001
39	3702285
40	449707069
41	43808767121
42	3202666462485
43	164411906603281
44	5637949058244465

[1, 1, 4, 1, 10, 70, 1, 20, 316, 3380, 1, 35, 1045, 23259, 344279, 1, 56, 2806, 112976, 3286101, 63241196, 1, 84, 6510, 427440, 21787375, 789333776, 18937075894, 1, 120, 13560, 1347676, 109770025, 6797996276, 296755137820, 8610006123300, 1, 165, 26001, 3702285, 449707069, 43808767121, 3202666462485, 164411906603281, 5637949058244465]

cp's OEIS Frontend

A301390 The number of n X k matrices, k=0..n, with nonnegative integer entries and every row and column sum <=3 . Triangle T(n>=0, 0<=k<=n) read by rows.

Table of values

List of values