A046733 - OEIS

%I #11 Apr 20 2021 22:57:45

%S 1,1,13,1,31,1,16,1,13,1,110,1,56,1,403,1,96,1,120,1,208,1,553,1,31,1,

%T 1,1,140,1,331,1,1430,1,496,1,469,1,728,1,560,1,308,1,403,1,46,1,112,

%U 1,1248,1,52,1,3410,1,1560,1,3541,1,620,1,208,1,1736,1

%N Periods for divisibility of A000213 by n.

%C If a(n) > 1, then n divides A000213(t + k * a(n)) for some specific value of t and all nonnegative integers k. a(n)=1, n > 1, implies there is no solution. - _Sean A. Irvine_, Apr 19 2021

%F a(2*n) = 1. - _Sean A. Irvine_, Apr 19 2021

%F More generally, a(k*m) = 1 for m in A046735 and all k >= 1. - _Sean A. Irvine_, Apr 19 2021

%Y Cf. A000213.

%K nonn

%O 1,3

%A _David W. Wilson_

%E a(25) corrected by _Sean A. Irvine_, Apr 19 2021