OFFSET
1,1
COMMENTS
a(9) and a(10) are identical because there is no number less than 35101 with nine palindromic representations in different bases; likewise for a(11) and a(12), and for a(13) and a(14).
PROG
(PARI) isok(k, n) = sum(b=2, k-1, (d=digits(k, b)) && (#d >= 3) && (Vecrev(d) == d)) >= n;
a(n) = my(j=1); while(! isok(j, n), j++); j; \\ Michel Marcus, Jul 28 2016
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Clive Stott, Jul 20 2016
EXTENSIONS
a(17)-a(32) from Giovanni Resta, Jul 28 2016
STATUS
approved