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A266279
Nonnegative integers where all occurring digits occur with equal frequency.
3
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67
OFFSET
1,3
COMMENTS
The set of terms of this sequence is a superset of each of the sets of terms of A050278 and A082810.
Except for i = 1, A261315(i) gives the number of existing n such that A055642(a(n)) = i.
LINKS
EXAMPLE
1122 is a term of the sequence, since all occurring digits occur twice.
MATHEMATICA
Select[Range[0, 67], Length@ Union[DigitCount[#] /. 0 -> Nothing] == 1 &] (* Michael De Vlieger, Jan 06 2016 *)
PROG
(PARI) digitcount(n) = my(d=digits(n), v=vector(10)); for(x=0, 9, for(k=1, #d, if(d[k]==x, v[x+1]++))); v
is(n) = my(c=digitcount(n), k=0); for(i=1, #c, if(k==0 && c[i]!=0, k=c[i]); if(k!=0 && c[i]!=0, if(k!=c[i], return(0)))); return(1)
CROSSREFS
KEYWORD
nonn,base,easy
AUTHOR
Felix Fröhlich, Dec 26 2015
STATUS
approved