A046656 Square roots of sums of squares of divisors in A046655.

1, 50, 290, 290, 850, 1690, 1690, 2210, 4930, 6710, 9802, 10660, 22100, 24650, 22100, 28730, 38918, 48100, 48100, 68900, 68900, 114070, 128180, 188500, 188500, 246500, 226798, 246500, 278980, 404260, 399620, 490100, 640900, 640900, 817700, 746980, 906100

Offset: 1

Author

Labos Elemer

Keywords

• nonn

Links

• Amiram Eldar, Table of n, a(n) for n = 1..1000 (terms 1..500 from Donovan Johnson)

Crossrefs

Cf. A001157, A046655.

Programs

Mathematica

Select[Sqrt[DivisorSigma[2, #]] & /@ Range[750000], IntegerQ] (* Jayanta Basu, Jun 27 2013 *)

Formula

a(n) = sqrt(A001157(A046655(n))). - Amiram Eldar, Aug 12 2023