A181330 - cp's OEIS frontend

A181330 Triangle read by rows: T(n,k) is the number of 2-compositions of n having k 0's in the top row A 2-composition of n is a nonnegative matrix with two rows, such that each column has at least one nonzero entry and whose entries sum up to n.

n	a(n)
0	1
1	1
2	1
3	3
4	3
5	1
6	8
7	10
8	5
9	1
10	21
11	32
12	21
13	7
14	1
15	55
16	99
17	80
18	36
19	9
20	1
21	144
22	299
23	286
24	160
25	55
26	11
27	1
28	377
29	887
30	978
31	650
32	280
33	78
34	13
35	1
36	987
37	2595
38	3236
39	2482
40	1275
41	448
42	105
43	15
44	1
45	2584
46	7508
47	10438
48	9054
49	5377
50	2261
51	672
52	136
53	17
54	1
55	6765
56	21526
57	32991
58	31882

[1, 1, 1, 3, 3, 1, 8, 10, 5, 1, 21, 32, 21, 7, 1, 55, 99, 80, 36, 9, 1, 144, 299, 286, 160, 55, 11, 1, 377, 887, 978, 650, 280, 78, 13, 1, 987, 2595, 3236, 2482, 1275, 448, 105, 15, 1, 2584, 7508, 10438, 9054, 5377, 2261, 672, 136, 17, 1, 6765, 21526, 32991, 31882]

cp's OEIS Frontend

A181330 Triangle read by rows: T(n,k) is the number of 2-compositions of n having k 0's in the top row A 2-composition of n is a nonnegative matrix with two rows, such that each column has at least one nonzero entry and whose entries sum up to n.

Table of values

List of values