A143081 - cp's OEIS frontend

A143081 A symmetrical triangle of coefficients based on A001147: a(n)=(2n-1)a(n-1); t(n,m)=a(n)^2/((2n - 1)a(m)*a(n - m)).

n	a(n)
1	-1
2	1
3	1
4	1
5	3
6	1
7	3
8	15
9	15
10	3
11	15
12	105
13	175
14	105
15	15
16	105
17	945
18	2205
19	2205
20	945
21	105
22	945
23	10395
24	31185
25	43659
26	31185
27	10395
28	945
29	10395
30	135135
31	495495
32	891891
33	891891
34	495495
35	135135
36	10395
37	135135
38	2027025
39	8783775
40	19324305
41	24845535
42	19324305
43	8783775
44	2027025
45	135135
46	2027025
47	34459425

[-1, 1, 1, 1, 3, 1, 3, 15, 15, 3, 15, 105, 175, 105, 15, 105, 945, 2205, 2205, 945, 105, 945, 10395, 31185, 43659, 31185, 10395, 945, 10395, 135135, 495495, 891891, 891891, 495495, 135135, 10395, 135135, 2027025, 8783775, 19324305, 24845535, 19324305, 8783775, 2027025, 135135, 2027025, 34459425]

cp's OEIS Frontend

A143081 A symmetrical triangle of coefficients based on A001147: a(n)=(2n-1)a(n-1); t(n,m)=a(n)^2/((2n - 1)a(m)*a(n - m)).

Table of values

List of values

cp's OEIS Frontend

A143081 A symmetrical triangle of coefficients based on A001147: a(n)=(2*n-1)*a(n-1); t(n,m)=a(n)^2/((2*n - 1)*a(m)*a(n - m)).

Table of values

List of values

A143081 A symmetrical triangle of coefficients based on A001147: a(n)=(2n-1)a(n-1); t(n,m)=a(n)^2/((2n - 1)a(m)*a(n - m)).