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A211771
Nonprime numbers with distinct digits in ascending order.
2
1, 4, 6, 8, 9, 12, 14, 15, 16, 18, 24, 25, 26, 27, 28, 34, 35, 36, 38, 39, 45, 46, 48, 49, 56, 57, 58, 68, 69, 78, 123, 124, 125, 126, 128, 129, 134, 135, 136, 138, 145, 146, 147, 148, 156, 158, 159, 168, 169, 178, 189, 234, 235, 236, 237, 238, 245, 246, 247
OFFSET
1,2
COMMENTS
Sequence is finite with 411 terms, last term is a(411) = 123456789.
Complement of A052015 with respect to A009993. Supersequence of A211772.
LINKS
Jaroslav Krizek, Table of n, a(n) for n = 1..411 (complete list)
FORMULA
A178788(a(n)) = 1.
MATHEMATICA
nnddQ[n_]:=!PrimeQ[n]&&Max[DigitCount[n]]<2&&Min[Differences[ IntegerDigits[ n]]]>0; Select[Range[300], nnddQ] (* Harvey P. Dale, Sep 27 2020 *)
CROSSREFS
Cf. A052015 (primes with distinct digits in ascending order), A009993 (numbers with distinct digits in ascending order), A211772 (nonprime numbers all of whose divisors are numbers whose decimal digits are in ascending order).
Sequence in context: A179891 A064590 A259315 * A211772 A353355 A231573
KEYWORD
nonn,base,fini
AUTHOR
Jaroslav Krizek, May 07 2012
STATUS
approved