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 A375325 #6 Oct 10 2024 16:03:43 %S A375325 1,1,2,2,1,2,2,2,3,1,1,4,2,2,2,3,1,3,2,2,4,1,1,4,2,2,4,4,1,2,2,3,2,1, %T A375325 2,6,2,2,4,2,1,4,2,2,3,1,1,6,3,2,2,4,1,4,1,4,4,1,1,4,2,2,6,4,2,2,2,2, %U A375325 2,2,1,6,2,2,4,4,2,4,2,3,5,1,1,8,1,2,2,2 %N A375325 a(n) is the number of divisors of n which are Loeschian numbers (A003136). %e A375325 a(1) = 1 because 1 has only one divisor 1 = A003136(2). %e A375325 a(3) = 2 because 3 has divisors 1 = A003136(2) and 3 = A003136(3). %e A375325 a(9) = 3 because 9 has the divisors 1 = A003136(2), 3 = A003136(3) and 9 = A003136(6). %o A375325 (Magma) f:=func<n|NormEquation(3, n) eq true>; [#[d:d in Divisors(n)|f(d)]:n in [1..150]]; %Y A375325 Cf. A003136. %K A375325 nonn %O A375325 1,3 %A A375325 _Marius A. Burtea_, Sep 15 2024