A046733 Periods for divisibility of A000213 by n.

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, 1, 1, 140, 1, 331, 1, 1430, 1, 496, 1, 469, 1, 728, 1, 560, 1, 308, 1, 403, 1, 46, 1, 112, 1, 1248, 1, 52, 1, 3410, 1, 1560, 1, 3541, 1, 620, 1, 208, 1, 1736, 1

Offset: 1

Author

David W. Wilson

Keywords

• nonn

Comments

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

Crossrefs

Cf. A000213.

Formula

a(2*n) = 1. - Sean A. Irvine, Apr 19 2021

More generally, a(k*m) = 1 for m in A046735 and all k >= 1. - Sean A. Irvine, Apr 19 2021

Extensions

a(25) corrected by Sean A. Irvine, Apr 19 2021