A260513 - cp's OEIS frontend

A260513 a(n) = (8n+13n^3+3*n^5)/24; also the sum of triangular numbers taken in successive groups of increasing size (see Example).

n	a(n)
1	1
2	9
3	46
4	164
5	460
6	1091
7	2289
8	4376
9	7779
10	13045
11	20856
12	32044
13	47606
14	68719
15	96755
16	133296
17	180149
18	239361
19	313234
20	404340
21	515536
22	649979
23	811141
24	1002824
25	1229175
26	1494701
27	1804284
28	2163196
29	2577114
30	3052135
31	3594791
32	4212064
33	4911401
34	5700729
35	6588470

[1, 9, 46, 164, 460, 1091, 2289, 4376, 7779, 13045, 20856, 32044, 47606, 68719, 96755, 133296, 180149, 239361, 313234, 404340, 515536, 649979, 811141, 1002824, 1229175, 1494701, 1804284, 2163196, 2577114, 3052135, 3594791, 4212064, 4911401, 5700729, 6588470]

cp's OEIS Frontend

A260513 a(n) = (8n+13n^3+3*n^5)/24; also the sum of triangular numbers taken in successive groups of increasing size (see Example).

Table of values

List of values

cp's OEIS Frontend

A260513 a(n) = (8*n+13*n^3+3*n^5)/24; also the sum of triangular numbers taken in successive groups of increasing size (see Example).

Table of values

List of values

A260513 a(n) = (8n+13n^3+3*n^5)/24; also the sum of triangular numbers taken in successive groups of increasing size (see Example).