OFFSET
1,1
EXAMPLE
2293 = 33133_5 = 14341_6.
3074 = 44244_5 = 22122_6.
PROG
(PARI) isok(m) = {my(nb = 0); for (b=2, m-1, my(d=digits(m, b)); if ((#d == 5) && (Vecrev(d) == d), nb++); if (nb == 2, return (1)); ); } \\ Michel Marcus, Feb 13 2021
CROSSREFS
KEYWORD
nonn,base
AUTHOR
John L. Drost, Sep 05 2010
STATUS
approved