A084231 - cp's OEIS frontend

A084231 Numbers k such that the root-mean-square value of 1, 2, ..., k, i.e., sqrt((1/k)*Sum_{j=1..k} j^2), is an integer.

n	a(n)
1	1
2	337
3	65521
4	12710881
5	2465845537
6	478361323441
7	92799630902161
8	18002650033695937
9	3492421306906109761
10	677511730889751597841
11	131433783371304903871537
12	25497476462302261599480481
13	4946378999903267445395341921
14	959572028504771582145096852337

[1, 337, 65521, 12710881, 2465845537, 478361323441, 92799630902161, 18002650033695937, 3492421306906109761, 677511730889751597841, 131433783371304903871537, 25497476462302261599480481, 4946378999903267445395341921, 959572028504771582145096852337]

cp's OEIS Frontend

A084231 Numbers k such that the root-mean-square value of 1, 2, ..., k, i.e., sqrt((1/k)*Sum_{j=1..k} j^2), is an integer.

Table of values

List of values