OFFSET
1,1
FORMULA
a(1)=2 a(2)=3 and for n>2, a(n)= 4*n!/3.
a(n) = A090802(n, n-3) for n > 2. - Ross La Haye, Sep 26 2005
MATHEMATICA
nxt[{n_, a_}]:={n+1, Ceiling[(n+1)(a-1/a)]}; Transpose[NestList[nxt, {1, 2}, 20]][[2]] (* Harvey P. Dale, May 30 2015 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Benoit Cloitre, May 06 2003
STATUS
approved