A049833 - cp's OEIS frontend

A049833 a(n) = T(2n-1,n) + T(2n,n+1) + ... + T(3n-3,2n-2) = sum over a period of n-th diagonal of array T given by A049828.

n	a(n)
1	0
2	1
3	5
4	13
5	23
6	40
7	54
8	80
9	104
10	131
11	161
12	209
13	231
14	288
15	332
16	376
17	426
18	499
19	549
20	631
21	673
22	748
23	826
24	940
25	972
26	1073
27	1177
28	1261
29	1347
30	1490
31	1526
32	1688
33	1774
34	1899
35	2031
36	2133
37	2219
38	2398
39	2538
40	2680
41	2766
42	2981
43	3039
44	3281
45	3379
46	3516
47	3724
48	3950
49	4002

[0, 1, 5, 13, 23, 40, 54, 80, 104, 131, 161, 209, 231, 288, 332, 376, 426, 499, 549, 631, 673, 748, 826, 940, 972, 1073, 1177, 1261, 1347, 1490, 1526, 1688, 1774, 1899, 2031, 2133, 2219, 2398, 2538, 2680, 2766, 2981, 3039, 3281, 3379, 3516, 3724, 3950, 4002]

cp's OEIS Frontend

A049833 a(n) = T(2n-1,n) + T(2n,n+1) + ... + T(3n-3,2n-2) = sum over a period of n-th diagonal of array T given by A049828.

Table of values

List of values