The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A213880 a(n) = sum of n-digit numbers with distinct nonzero digits. 0
 45, 3960, 279720, 16798320, 839991600, 33599966400, 1007999899200, 20159999798400, 201599999798400 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 REFERENCES H. E. Dudeney, Amusements in Mathematics, Dover, NY, 1917, pp. 17, 160. LINKS H. E. Dudeney, Amusements in Mathematics [Gutenberg Project Etext] FORMULA a(n) = 5*(10^n - 1)*8!/(9 - n)!. MATHEMATICA Table[5*(10^n - 1)*8!/(9 - n)!, {n, 9}] PROG (MAGMA) [ 5*(10^n-1)*Factorial(8)/Factorial(9-n) : n in [1..9]] (PARI) vector(9, n, 5*(10^n-1)*8!/(9-n)!) CROSSREFS Sequence in context: A184286 A130017 A025755 * A113630 A143004 A004707 Adjacent sequences:  A213877 A213878 A213879 * A213881 A213882 A213883 KEYWORD base,easy,fini,full,nonn AUTHOR Arkadiusz Wesolowski, Jun 23 2012 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified January 27 06:18 EST 2022. Contains 350601 sequences. (Running on oeis4.)