OFFSET
1,1
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..10000 (terms 1..1000 from Harvey P. Dale)
Alonso Del Arte, Classifications of prime numbers - By representation in specific bases, OEIS Wiki as of Mar 19 2010.
MATHEMATICA
Select[Prime[Range[300]], Min[DigitCount[#, 4]]>0&] (* Harvey P. Dale, Apr 15 2012 *)
PROG
(PARI) base(n, b=4, s=0)={local(a=[n%b]); while(0<n\=b, a=concat(n%b, a)); if(s, s=32*s+23; Strchr(vectorsmall(#a, i, if(a[i]>9, s, 48)+a[i])), a)}
forprime(p=1, 1999, #Set(base(p, 4))==4 & print1(p", "))
CROSSREFS
KEYWORD
nonn,base
AUTHOR
M. F. Hasler, May 27 2010
STATUS
approved