OFFSET
1,1
FORMULA
Let b(1)=1 b(n+1)=b(n)*floor(n/b(n))+n*floor(b(n)/n) then a(n)=b(n+3)
MATHEMATICA
Table[3*2^(n-1), {n, 1, 5}, {3*2^(n-1)}] // Flatten (* Jean-François Alcover, Nov 24 2016 *)
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Benoit Cloitre, Aug 17 2002
STATUS
approved