A270449 - cp's OEIS frontend

A270449 Odd integers n such that the sum of the Pell numbers A000129(0) + ... + A000129(n-1) is divisible by n*(n+1)/2.

n	a(n)
1	13
2	61
3	157
4	181
5	193
6	337
7	385
8	397
9	541
10	673
11	733
12	769
13	877
14	1153
15	1201
16	1213
17	1453
18	1873
19	1933
20	2017
21	2029
22	2557
23	2593
24	2797
25	3217
26	3313
27	3517
28	4177
29	4273
30	4561
31	4621
32	4657
33	5101
34	5233
35	5437
36	5581
37	5641
38	6337
39	6637
40	6781
41	7057
42	7213
43	7393
44	7481
45	7537
46	7561
47	7933
48	8221
49	8317

[13, 61, 157, 181, 193, 337, 385, 397, 541, 673, 733, 769, 877, 1153, 1201, 1213, 1453, 1873, 1933, 2017, 2029, 2557, 2593, 2797, 3217, 3313, 3517, 4177, 4273, 4561, 4621, 4657, 5101, 5233, 5437, 5581, 5641, 6337, 6637, 6781, 7057, 7213, 7393, 7481, 7537, 7561, 7933, 8221, 8317]

cp's OEIS Frontend

A270449 Odd integers n such that the sum of the Pell numbers A000129(0) + ... + A000129(n-1) is divisible by n*(n+1)/2.

Table of values

List of values