|
|
A164335
|
|
Quintic recurrence sequence a(0) = 1, a(n) = n*a(n-1)^5.
|
|
1
|
|
|
|
OFFSET
|
0,3
|
|
COMMENTS
|
Number of different orderings for n-input trees in a Free Quinary Decision Diagram.
a(7) onward have more than 1000 digits. - G. C. Greubel, Sep 14 2017
|
|
LINKS
|
|
|
FORMULA
|
a(0) = 1, a(n) = n*a(n-1)^5.
|
|
MATHEMATICA
|
nxt[{n_, a_}] := {n + 1, (n + 1) a^5}; NestList[nxt, {0, 1}, 5][[All, 2]] (* G. C. Greubel, Sep 14 2017 *)
|
|
PROG
|
(PARI) a(n) = if (n==0, 1, n*a(n-1)^5); \\ Michel Marcus, Sep 14 2017
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
David Willingham (D.Willingham(AT)wmin.ac.uk), Aug 13 2009
|
|
STATUS
|
approved
|
|
|
|