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

1,2

Links

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

Formula

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

Mathematica

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

Crossrefs

Cf. A001157, A046655.

Sequence in context: A220864 A205355 A172519 * A205620 A183698 A183690

Adjacent sequences: A046653 A046654 A046655 * A046657 A046658 A046659

Keyword

nonn

Author

Labos Elemer

Status

approved