A181327 - cp's OEIS frontend

A181327 Triangle read by rows: T(n,k) is the number of 2-compositions of n having k columns with an even sum (0<=k<=floor(n/2)).

n	a(n)
0	1
1	2
2	4
3	3
4	12
5	12
6	32
7	41
8	9
9	86
10	140
11	54
12	232
13	451
14	246
15	27
16	624
17	1416
18	1008
19	216
20	1680
21	4357
22	3811
23	1215
24	81
25	4522
26	13192
27	13692
28	5832
29	810
30	12172
31	39455
32	47380
33	25254
34	5400
35	243
36	32764
37	116820
38	159296
39	102024
40	29700
41	2916
42	88192
43	343029
44	523549

[1, 2, 4, 3, 12, 12, 32, 41, 9, 86, 140, 54, 232, 451, 246, 27, 624, 1416, 1008, 216, 1680, 4357, 3811, 1215, 81, 4522, 13192, 13692, 5832, 810, 12172, 39455, 47380, 25254, 5400, 243, 32764, 116820, 159296, 102024, 29700, 2916, 88192, 343029, 523549]

cp's OEIS Frontend

A181327 Triangle read by rows: T(n,k) is the number of 2-compositions of n having k columns with an even sum (0<=k<=floor(n/2)).

Table of values

List of values