1,2

Numbers n for which the least missing nonzero digit (A329028) in their primorial base expansion is 1.

Antti Karttunen, Table of n, a(n) for n = 1..92160

Index entries for sequences related to primorial base

(PARI)

A329028(n) = { my(m=Map(), p=2); while(n, mapput(m, (n%p), 1); n = n\p; p = nextprime(1+p)); for(k=1, oo, if(!mapisdefined(m, k), return(k))); };

isA328840(n) = (1 == A329028(n));

Cf. A049345.

Positions of ones in A329028.

Cf. also A328574 and A329027.

Cf. A255411 for an analogous sequence.

Sequence in context: A144976 A119622 A280892 * A255411 A067575 A193022

Adjacent sequences: A328837 A328838 A328839 * A328841 A328842 A328843

nonn,base

Antti Karttunen, Nov 07 2019

approved