A027144 - cp's OEIS frontend

A027144 Triangular array T given by rows: T(n,0)=1 for n >= 0, T(1,1)=2; for even n >= 2, T(n,k)=T(n-2,k-1)+T(n-1,k-1)+T(n-1,k) for 1<=(odd k)<=n-1 and T(n,k)=T(n-1,k-1)+T(n-1,k) for 2<=(even k)<=n-2, T(n,n)=T(n-1,n-1); for odd n<=3, T(n,k)=T(n,k-1)+T(n-1,k-1)+T(n-1,k) for 1<=(odd k)<=n-2 and T(n,k)=T(n-1,k-1)+T(n-1,k) for 2<=(even k)<=n-1, T(n,n)=T(n-1,n-1)+T(n,n-1).

n	a(n)
1	1
2	1
3	2
4	1
5	4
6	2
7	1
8	6
9	6
10	8
11	1
12	8
13	12
14	16
15	8
16	1
17	10
18	20
19	48
20	24
21	32
22	1
23	12
24	30
25	80
26	72
27	64
28	32
29	1
30	14
31	42
32	152
33	152
34	288
35	96
36	128
37	1
38	16
39	56
40	224
41	304
42	512
43	384
44	256
45	128
46	1
47	18
48	72
49	352
50	528
51	1344
52	896
53	1536
54	384
55	512
56	1
57	20
58	90
59	480
60	880

[1, 1, 2, 1, 4, 2, 1, 6, 6, 8, 1, 8, 12, 16, 8, 1, 10, 20, 48, 24, 32, 1, 12, 30, 80, 72, 64, 32, 1, 14, 42, 152, 152, 288, 96, 128, 1, 16, 56, 224, 304, 512, 384, 256, 128, 1, 18, 72, 352, 528, 1344, 896, 1536, 384, 512, 1, 20, 90, 480, 880]

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