A181299 - cp's OEIS frontend

A181299 Triangle read by rows: T(n,k) is the number of 2-compositions of n having k columns in which the top entry is equal to the bottom entry (0<=k<=floor(n/2)).

n	a(n)
0	1
1	2
2	6
3	1
4	20
5	4
6	64
7	17
8	1
9	206
10	68
11	6
12	662
13	261
14	32
15	1
16	2128
17	976
18	152
19	8
20	6840
21	3577
22	675
23	51
24	1
25	21986
26	12912
27	2860
28	280
29	10
30	70670
31	46049
32	11704
33	1406
34	74
35	1
36	227156
37	162628
38	46632
39	6632
40	460
41	12
42	730152
43	569705
44	181877
45	29866
46	2570
47	101
48	1
49	2346942

[1, 2, 6, 1, 20, 4, 64, 17, 1, 206, 68, 6, 662, 261, 32, 1, 2128, 976, 152, 8, 6840, 3577, 675, 51, 1, 21986, 12912, 2860, 280, 10, 70670, 46049, 11704, 1406, 74, 1, 227156, 162628, 46632, 6632, 460, 12, 730152, 569705, 181877, 29866, 2570, 101, 1, 2346942]

cp's OEIS Frontend

A181299 Triangle read by rows: T(n,k) is the number of 2-compositions of n having k columns in which the top entry is equal to the bottom entry (0<=k<=floor(n/2)).

Table of values

List of values