A102220 - cp's OEIS frontend

A102220 Triangular matrix, read by rows, equal to [2*I - A008459]^(-1), i.e., the matrix inverse of the difference of twice the identity matrix and the triangular matrix of squared binomial coefficients.

n	a(n)
0	1
1	1
2	1
3	5
4	4
5	1
6	55
7	45
8	9
9	1
10	1077
11	880
12	180
13	16
14	1
15	32951
16	26925
17	5500
18	500
19	25
20	1
21	1451723
22	1186236
23	242325
24	22000
25	1125
26	36
27	1
28	87054773
29	71134427
30	14531391
31	1319325
32	67375
33	2205
34	49
35	1
36	6818444405
37	5571505472
38	1138150832
39	103334336
40	5277300
41	172480
42	3920
43	64
44	1

[1, 1, 1, 5, 4, 1, 55, 45, 9, 1, 1077, 880, 180, 16, 1, 32951, 26925, 5500, 500, 25, 1, 1451723, 1186236, 242325, 22000, 1125, 36, 1, 87054773, 71134427, 14531391, 1319325, 67375, 2205, 49, 1, 6818444405, 5571505472, 1138150832, 103334336, 5277300, 172480, 3920, 64, 1]

cp's OEIS Frontend

A102220 Triangular matrix, read by rows, equal to [2*I - A008459]^(-1), i.e., the matrix inverse of the difference of twice the identity matrix and the triangular matrix of squared binomial coefficients.

Table of values

List of values