A023744 Base 6 expansion uses each positive digit just once.

1865, 1870, 1895, 1905, 1930, 1935, 2045, 2050, 2105, 2120, 2140, 2150, 2255, 2265, 2285, 2300, 2355, 2360, 2470, 2475, 2500, 2510, 2535, 2540, 2945, 2950, 2975, 2985, 3010, 3015, 3305, 3310, 3395, 3415, 3430, 3445

Offset: 1

Author

Olivier Gérard

Keywords

• nonn
• base
• easy
• fini
• full

Comments

Leading zeros are permitted. There are a total of 6! = 720 terms in the sequence. - Harvey P. Dale, Jan 22 2013

Links

• Harvey P. Dale, Table of n, a(n) for n = 1..720

Crossrefs

Cf. A031947.

Programs

Mathematica

Union[ Map[ Plus@@(Array[ (6^#)&, Length[ # ], 0 ]*#)&, Permutations[ Range[ 6-1 ] ] ] ]
FromDigits[#,6]&/@Permutations[Range[0,5]] (* Harvey P. Dale, Jan 22 2013 *)

Extensions

Keyword "fini" added by Harvey P. Dale, Jan 22 2013