OFFSET
1,1
LINKS
Clark Kimberling, Table of n, a(n) for n = 1..500
EXAMPLE
The least prime starting with seed 10 is 101; the least prime starting with 101 is 1013; the least prime starting with 1013 is 10133. Triangular format:
10
101
1013
10133
101333
10133303
1013330309
MATHEMATICA
b = 10; s = {{10}};
Do[NestWhile[# + 1 &, 0, ! (PrimeQ[FromDigits[tmp = Join[Last[s], (nn = #;
IntegerDigits[nn - Sum[b^n, {n, l = NestWhile[# + 1 &, 1, ! (nn - (Sum[b^n, {n, #}]) < 0) &] - 1}], b, l + 1])], b]]) &]; AppendTo[s, tmp], {20}]; Map[FromDigits, s] (* Peter J. C. Moses, Aug 06 2015 *)
CROSSREFS
KEYWORD
nonn,easy,base
AUTHOR
Clark Kimberling, Sep 16 2015
STATUS
approved