A100963 - cp's OEIS frontend

A100963 a(1)=1. a(n) = a(n-1) + sum of the triangular numbers which are among the first (n-1) terms of the sequence.

n	a(n)
1	1
2	2
3	3
4	7
5	11
6	15
7	34
8	53
9	72
10	91
11	201
12	311
13	421
14	531
15	641
16	751
17	861
18	1832
19	2803
20	3774
21	4745
22	5716
23	6687
24	7658
25	8629
26	9600
27	10571
28	11542
29	12513
30	13484
31	14455
32	15426
33	16397
34	17368
35	18339
36	19310
37	20281
38	21252
39	22223
40	23194
41	24165
42	25136
43	26107
44	27078
45	28049

[1, 2, 3, 7, 11, 15, 34, 53, 72, 91, 201, 311, 421, 531, 641, 751, 861, 1832, 2803, 3774, 4745, 5716, 6687, 7658, 8629, 9600, 10571, 11542, 12513, 13484, 14455, 15426, 16397, 17368, 18339, 19310, 20281, 21252, 22223, 23194, 24165, 25136, 26107, 27078, 28049]

cp's OEIS Frontend

A100963 a(1)=1. a(n) = a(n-1) + sum of the triangular numbers which are among the first (n-1) terms of the sequence.

Table of values

List of values