A178477 Permutations of 1234567: Numbers having each of the decimal digits 1,...,7 exactly once, and no other digit.

1234567, 1234576, 1234657, 1234675, 1234756, 1234765, 1235467, 1235476, 1235647, 1235674, 1235746, 1235764, 1236457, 1236475, 1236547, 1236574, 1236745, 1236754, 1237456, 1237465, 1237546, 1237564, 1237645, 1237654

Offset: 1

Author

M. F. Hasler, Oct 09 2010

Keywords

• nonn
• fini
• full
• easy
• base

Comments

It would be nice to have a simple explicit formula for the n-th term.

Contains A000142(7) = 5040 terms. - R. J. Mathar, Apr 08 2011

An efficient procedure for generating the n-th term of this sequence can be found at A178475. - Nathaniel Johnston, May 19 2011

Links

• Nathaniel Johnston, Table of n, a(n) for n = 1..5040 (full sequence)

Crossrefs

Cf. A030298, A030299, A055089, A060117, A178475, A178476.

Programs

Mathematica

FromDigits/@Take[Permutations[Range[7]],50] (* Harvey P. Dale, Nov 11 2012 *)

PARI

is_A178477(x)= { vecsort(Vec(Str(x)))==Vec("1234567") }