173859840000
domain: N
Appears in sequences
- a(n) = Catalan(n) * Product_{k = 0..n-1} a(k).at n=6A003047
- C_{n+1}*C_n*C_{n-1}^2*C_{n-2}^4*...*C_2^{2^(n-2)}, where C_k are the Catalan numbers (A000108).at n=5A028580
- Number of nested algorithms a(m,n) where m is the number of items in a contaminated group and n is the total number of unclassified items (0 <= m <= n) (values read by antidiagonals).at n=15A055633
- Number of nested algorithms a(m,n) where m is the number of items in a contaminated group and n is the total number of unclassified items (0 <= m <= n) (values read by antidiagonals).at n=23A055633