A211771 Nonprime numbers with distinct digits in ascending order.

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

Adjacent sequences: A211768 A211769 A211770 * A211772 A211773 A211774

Keyword

nonn,base,fini

Author

Jaroslav Krizek, May 07 2012

Status

approved