a(n) is the smallest odd k > 1 such that k is a Niven number at least in all the bases from 1 to n.
A226319
a(n) is the smallest odd k > 1 such that k is a Niven number at least in all the bases from 1 to n.
Terms
- a(0) =3a(1) =21a(2) =21a(3) =21a(4) =675a(5) =4725a(6) =4725a(7) =98175a(8) =140175a(9) =543375a(10) =543375a(11) =23186625a(12) =35026425a(13) =139264125a(14) =139264125a(15) =608679225a(16) =11553990525a(17) =87662479905a(18) =87662479905a(19) =343947649815
External references
- oeis: A226319