A336124 a(n) = A122111(n) mod 4.

1, 2, 0, 3, 0, 2, 0, 1, 1, 0, 0, 2, 0, 0, 2, 3, 0, 3, 0, 0, 0, 0, 0, 2, 3, 0, 1, 0, 0, 2, 0, 3, 0, 0, 2, 1, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 2, 1, 1, 0, 0, 0, 3, 0, 0, 0, 0, 0, 2, 0, 0, 0, 1, 0, 0, 0, 0, 0, 2, 0, 1, 0, 0, 3, 0, 2, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 2, 0, 3, 0, 3, 0, 0, 0, 0, 2

Offset: 1

Author

Antti Karttunen, Jul 15 2020

Keywords

• nonn

Links

• Antti Karttunen, Table of n, a(n) for n = 1..65537

Crossrefs

Cf. A010873, A064989, A122111, A336120.

Programs

PARI

A064989(n) = {my(f); f = factor(n); if((n>1 && f[1,1]==2), f[1,2] = 0); for (i=1, #f~, f[i,1] = precprime(f[i,1]-1)); factorback(f)};
A122111(n) = if(1==n,n,prime(bigomega(n))*A122111(A064989(n)));
A336124(n) = (A122111(n)%4);

Formula

a(n) = A010873(A122111(n)).