A173576 6-Factorions: equal to the sum of the 6-ple factorials of their digits in base 10.

1, 2, 3, 4, 5, 6, 7, 29

Offset

1,2

Links

Table of n, a(n) for n=1..8.

Example

29 -> 2!!!!!! + 9!!!!!! = 2 + 9*3 = 2 + 27 = 29.

Maple

P:=proc(n, m) local a, b, i, j, k, x, w; for i from 1 by 1 to n do a:=0; b:=0; w:=0; k:=i; while k>0 do w:=k-(trunc(k/10)*10); j:=w; x:=w-m; if w=0 then b:=1; else while x>0 do j:=j*x; x:=x-m; od; b:=j; fi; a:=a+b; k:=trunc(k/10); od; if a=i then lprint(i, a); fi; od; end: P(1000, 6);

Crossrefs

Cf. A014080, A097653, A173573-A173575, A173577.

Sequence in context: A142594 A010351 A183530 * A364154 A024645 A004847

Adjacent sequences: A173573 A173574 A173575 * A173577 A173578 A173579

Keyword

easy,fini,nonn,base,changed

Author

Paolo P. Lava, Feb 22 2010

Status

approved