A163771 - cp's OEIS frontend

A163771 Triangle interpolating the swinging factorial (A056040) restricted to even indices with its binomial inverse. Same as interpolating the central trinomial coefficients (A002426) with the central binomial coefficients (A000984).

n	a(n)
0	1
1	1
2	2
3	3
4	4
5	6
6	7
7	10
8	14
9	20
10	19
11	26
12	36
13	50
14	70
15	51
16	70
17	96
18	132
19	182
20	252
21	141
22	192
23	262
24	358
25	490
26	672
27	924
28	393
29	534
30	726
31	988
32	1346
33	1836
34	2508
35	3432
36	1107
37	1500
38	2034
39	2760
40	3748
41	5094
42	6930
43	9438
44	12870

[1, 1, 2, 3, 4, 6, 7, 10, 14, 20, 19, 26, 36, 50, 70, 51, 70, 96, 132, 182, 252, 141, 192, 262, 358, 490, 672, 924, 393, 534, 726, 988, 1346, 1836, 2508, 3432, 1107, 1500, 2034, 2760, 3748, 5094, 6930, 9438, 12870]

cp's OEIS Frontend

A163771 Triangle interpolating the swinging factorial (A056040) restricted to even indices with its binomial inverse. Same as interpolating the central trinomial coefficients (A002426) with the central binomial coefficients (A000984).

Table of values

List of values