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A244008
Nonnegative integers with no repeated letters in their combined English decimal digit names.
0
0, 1, 2, 4, 5, 6, 8, 16, 25, 26, 46, 48, 52, 60, 61, 62, 64, 84
OFFSET
1,3
EXAMPLE
The first multi-digit term is 16 since "one" and "six" taken together contain no duplicate letters. Although "one" itself contains no duplicate letters, by definition 11 is not a term since duplicate digits introduce repeated letters.
PROG
(Python)
m = ["zero", "one", "two", "three", "four", "five", "six", "seven", "eight", "nine"]
def nr(w): return len(w) == len(set(w))
afull = [k for k in range(988) if nr("".join(m[int(d)] for d in str(k)))]
print(afull) # Michael S. Branicky, Aug 18 2022
(PARI) is(n)=my(d=apply(k->[25, 9, 40, 64, 26, 7, 4, 64, 37, 64][k+1], digits(n)), t); for(i=1, #d, if(bitand(t, d[i]), return(0)); t=bitor(t, d[i])); t<64 \\ Charles R Greathouse IV, Aug 18 2022
CROSSREFS
Subsequence of A010784, A052405, A052419, and A007095.
Cf. A059916.
Sequence in context: A327061 A326913 A326703 * A104704 A169884 A341260
KEYWORD
nonn,word,base,fini,full,easy
AUTHOR
Rick L. Shepherd, Jun 17 2014
STATUS
approved