OFFSET
0,3
FORMULA
a(n) is asymptotic to n^2/4
MATHEMATICA
RecurrenceTable[{a[0]==a[1]==1, a[n]==a[n-1]+Floor[Sqrt[a[n-2]]]}, a, {n, 60}] (* Harvey P. Dale, Jul 28 2018 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Benoit Cloitre, Oct 25 2002
STATUS
approved