A331071 - cp's OEIS frontend

A331071 a(n) = Sum_{k <= n} r_2(k)^2*d(k+1), where r_2 = A004018, d = A000005.

n	a(n)
0	1
1	33
2	65
3	65
4	97
5	353
6	353
7	353
8	401
9	465
10	593
11	593
12	593
13	849
14	849
15	849
16	881
17	1265
18	1297
19	1297
20	1553
21	1553
22	1553
23	1553
24	1553
25	2129
26	2385
27	2385
28	2385
29	2897
30	2897
31	2897
32	2961
33	2961
34	3217
35	3217
36	3249
37	3505
38	3505
39	3505
40	3633
41	4145
42	4145
43	4145
44	4145
45	4401
46	4401
47	4401
48	4401
49	4497
50	5073
51	5073
52	5201
53	5713
54	5713

[1, 33, 65, 65, 97, 353, 353, 353, 401, 465, 593, 593, 593, 849, 849, 849, 881, 1265, 1297, 1297, 1553, 1553, 1553, 1553, 1553, 2129, 2385, 2385, 2385, 2897, 2897, 2897, 2961, 2961, 3217, 3217, 3249, 3505, 3505, 3505, 3633, 4145, 4145, 4145, 4145, 4401, 4401, 4401, 4401, 4497, 5073, 5073, 5201, 5713, 5713]

cp's OEIS Frontend

A331071 a(n) = Sum_{k <= n} r_2(k)^2*d(k+1), where r_2 = A004018, d = A000005.

Table of values

List of values