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 A063944 Final nonzero digit of (n!)! (A000197). 2
 1, 1, 2, 2, 6, 6, 6, 4, 6, 8, 2, 8, 8, 6, 4, 4, 6, 6, 8, 2, 6, 4, 4, 8, 2, 2, 6, 2, 2, 6, 4, 6, 2, 2, 8, 4, 6, 8, 2, 2, 2, 2, 8, 6, 6, 6, 2, 2, 6, 8, 4, 2, 2, 2, 8, 8, 4, 4, 2, 6, 8, 6, 4, 6, 6, 4, 8, 2, 2, 4, 4, 2, 8, 2, 8, 2, 4, 2, 8, 8, 6, 8, 2, 8, 4, 4, 6, 8, 8, 6, 2, 4, 6, 2, 6, 4, 2, 6, 4, 6, 2, 6, 4, 2, 8, 2, 4, 2 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 LINKS David W. Wilson, Table of n, a(n) for n = 0..10000 PROG (PARI) for(n=0, 22, m=n!!; while(Mod(m, 10) == 0, m=m/10); print(Mod(m, 10))) CROSSREFS Cf. A000197, A008904. Sequence in context: A167909 A185421 A219976 * A086447 A324032 A196872 Adjacent sequences:  A063941 A063942 A063943 * A063945 A063946 A063947 KEYWORD nonn,base AUTHOR Jason Earls, Sep 01 2001 EXTENSIONS More terms from David W. Wilson, Sep 05 2001, who remarks that "I'll tell you, computing (107!)! took up some disk space!" STATUS approved

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Last modified May 15 17:50 EDT 2021. Contains 343920 sequences. (Running on oeis4.)