OFFSET

0,2

COMMENTS

EXAMPLE

a(4) = 21 because 4 = "10" (in base 4) becomes "21".

a(15) = 0 because 15 = "33" (in base 4) becomes "00".

PROG

(PARI) A256304(n, b=4)=!n+eval(Strchr(apply(d->(d+1)%b+48, digits(n, b))))

CROSSREFS

KEYWORD

nonn,base,easy

AUTHOR

M. F. Hasler, Mar 22 2015

STATUS

approved