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A097642 Numbers k such that k = (d_1! + d_2! + ... + d_k!) - (d_1 + d_2 + ... + d_k) where d_1 d_2 ... d_k is the decimal expansion of k. 2
3, 115, 6576, 80855 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
EXAMPLE
80855 is in the sequence because 80855 = (8! + 0! + 8! + 5! + 5!) - (8 + 0 + 8 + 5 + 5).
MATHEMATICA
okQ[n_]:=Module[{idn=IntegerDigits[n]}, n==Total[idn!]-Total[idn]]; Select[Range[81000], okQ] (* Harvey P. Dale, Aug 26 2011 *)
CROSSREFS
Cf. A097643.
Sequence in context: A229929 A267897 A132304 * A009095 A326995 A155209
KEYWORD
base,fini,full,nice,nonn
AUTHOR
Farideh Firoozbakht, Aug 22 2004
STATUS
approved

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Last modified April 23 15:20 EDT 2024. Contains 371916 sequences. (Running on oeis4.)