A275212 - cp's OEIS frontend

A275212 Triangle read by rows, T(n,k) = (n+k+1)! / ([(n-k)/2]! * [(n+k+2)/2]!) with [.] the floor function, for n>=0 and 0<=k<=n.

n	a(n)
0	1
1	2
2	3
3	3
4	12
5	20
6	12
7	20
8	120
9	210
10	10
11	120
12	210
13	1680
14	3024
15	60
16	105
17	1680
18	3024
19	30240
20	55440
21	35
22	840
23	1512
24	30240
25	55440
26	665280
27	1235520
28	280
29	504
30	15120
31	27720
32	665280
33	1235520
34	17297280
35	32432400
36	126
37	5040
38	9240
39	332640
40	617760
41	17297280
42	32432400
43	518918400
44	980179200

[1, 2, 3, 3, 12, 20, 12, 20, 120, 210, 10, 120, 210, 1680, 3024, 60, 105, 1680, 3024, 30240, 55440, 35, 840, 1512, 30240, 55440, 665280, 1235520, 280, 504, 15120, 27720, 665280, 1235520, 17297280, 32432400, 126, 5040, 9240, 332640, 617760, 17297280, 32432400, 518918400, 980179200]

cp's OEIS Frontend

A275212 Triangle read by rows, T(n,k) = (n+k+1)! / ([(n-k)/2]! * [(n+k+2)/2]!) with [.] the floor function, for n>=0 and 0<=k<=n.

Table of values

List of values