This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A374442 #5 Jul 13 2024 12:36:08 %S A374442 1,2,5,8,8,14,21,20,14,18,37,32,36,38,53,60,26,50,51,56,64,86,85,68, %T A374442 66,50,101,48,92,86,165,92,50,138,133,152,96,110,149,164,118,122,237, %U A374442 128,148,150,181,140,126,98,145,216,176,158,141,244,170,242,229,176,300 %N A374442 Row sums of A374443. %p A374442 rad := n -> ifelse(n = 0, 1, NumberTheory:-Radical(n)): %p A374442 a := n -> local k; add(rad(igcd(n, k)), k = 0..n): %p A374442 seq(a(n), n = 0..60); %Y A374442 Cf. A374443. %K A374442 nonn %O A374442 0,2 %A A374442 _Peter Luschny_, Jul 12 2024