A374442 - OEIS

A374442

Row sums of A374443.

1, 2, 5, 8, 8, 14, 21, 20, 14, 18, 37, 32, 36, 38, 53, 60, 26, 50, 51, 56, 64, 86, 85, 68, 66, 50, 101, 48, 92, 86, 165, 92, 50, 138, 133, 152, 96, 110, 149, 164, 118, 122, 237, 128, 148, 150, 181, 140, 126, 98, 145, 216, 176, 158, 141, 244, 170, 242, 229, 176, 300

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OFFSET

0,2

LINKS

Table of n, a(n) for n=0..60.

MAPLE

rad := n -> ifelse(n = 0, 1, NumberTheory:-Radical(n)):

a := n -> local k; add(rad(igcd(n, k)), k = 0..n):

seq(a(n), n = 0..60);

CROSSREFS

Cf. A374443.

Sequence in context: A356870 A351391 A046825 * A250320 A250561 A131716

Adjacent sequences: A374439 A374440 A374441 * A374443 A374444 A374445

KEYWORD

nonn

AUTHOR

Peter Luschny, Jul 12 2024

STATUS

approved