A306625 - cp's OEIS frontend

A306625 Regular triangle T(n,k) = binomial(2n-2k,n-k)((n+1)/k)Sum_{k=0..floor((k-1)/2)} (-1)^kbinomial(2k,k)binomial(n+3k-2k,k-2k-1), read by rows.

n	a(n)
1	2
2	6
3	12
4	24
5	36
6	80
7	100
8	150
9	240
10	560
11	420
12	660
13	1020
14	1680
15	4032
16	1764
17	2940
18	4620
19	7224
20	12096
21	29568
22	7392
23	13104
24	21280
25	33320
26	52416
27	88704
28	219648
29	30888
30	58212
31	98280
32	156870
33	244800
34	386496
35	658944
36	1647360
37	128700
38	257400
39	452760
40	742140
41	1170540
42	1821600
43	2882880
44	4942080
45	12446720

[2, 6, 12, 24, 36, 80, 100, 150, 240, 560, 420, 660, 1020, 1680, 4032, 1764, 2940, 4620, 7224, 12096, 29568, 7392, 13104, 21280, 33320, 52416, 88704, 219648, 30888, 58212, 98280, 156870, 244800, 386496, 658944, 1647360, 128700, 257400, 452760, 742140, 1170540, 1821600, 2882880, 4942080, 12446720]

cp's OEIS Frontend

A306625 Regular triangle T(n,k) = binomial(2n-2k,n-k)((n+1)/k)Sum_{k=0..floor((k-1)/2)} (-1)^kbinomial(2k,k)binomial(n+3k-2k,k-2k-1), read by rows.

Table of values

List of values

cp's OEIS Frontend

A306625 Regular triangle T(n,k) = binomial(2*n-2*k,n-k)*((n+1)/k)*Sum_{k=0..floor((k-1)/2)} (-1)^k*binomial(2*k,k)*binomial(n+3*k-2*k,k-2*k-1), read by rows.

Table of values

List of values

A306625 Regular triangle T(n,k) = binomial(2n-2k,n-k)((n+1)/k)Sum_{k=0..floor((k-1)/2)} (-1)^kbinomial(2k,k)binomial(n+3k-2k,k-2k-1), read by rows.