A177020 - cp's OEIS frontend

A177020 Define two triangular arrays by: B(0,0)=C(0,0)=1, B(0,r)=C(0,r)=0 for r>0, C(t,-1)=C(t,0); and for t,r >= 0, B(t+1,r)=C(t,r-1)+2C(t,r)-B(t,r), C(t+1,r)=B(t+1,r)+2B(t+1,r+1)-C(t,r). Sequence gives array C(t,r) read by rows.

n	a(n)
0	1
1	3
2	1
3	12
4	5
5	1
6	53
7	25
8	7
9	1
10	247
11	126
12	42
13	9
14	1
15	1192
16	642
17	239
18	63
19	11
20	1
21	5897
22	3306
23	1330
24	400
25	88
26	13
27	1
28	29723
29	17187
30	7327
31	2419
32	617
33	117
34	15
35	1
36	152020
37	90099
38	40187
39	14233
40	4033
41	898
42	150
43	17
44	1

[1, 3, 1, 12, 5, 1, 53, 25, 7, 1, 247, 126, 42, 9, 1, 1192, 642, 239, 63, 11, 1, 5897, 3306, 1330, 400, 88, 13, 1, 29723, 17187, 7327, 2419, 617, 117, 15, 1, 152020, 90099, 40187, 14233, 4033, 898, 150, 17, 1]

cp's OEIS Frontend

A177020 Define two triangular arrays by: B(0,0)=C(0,0)=1, B(0,r)=C(0,r)=0 for r>0, C(t,-1)=C(t,0); and for t,r >= 0, B(t+1,r)=C(t,r-1)+2C(t,r)-B(t,r), C(t+1,r)=B(t+1,r)+2B(t+1,r+1)-C(t,r). Sequence gives array C(t,r) read by rows.

Table of values

List of values