Number of sequences (x(k))_{k=1..n}, of n strictly increasing terms of nonnegative integers {x(1)<x(2)<...<x(n)}, satisfying x(k) <= k^2 for all k.
A242105
Number of sequences (x(k))_{k=1..n}, of n strictly increasing terms of nonnegative integers {x(1)<x(2)<...<x(n)}, satisfying x(k) <= k^2 for all k.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =44a(4) =428a(5) =5802a(6) =102322a(7) =2239844a(8) =58849332a(9) =1810039960a(10) =63930543419
External references
- oeis: A242105