73816

Appears in sequences

• Number of rules of a context-free grammar in Chomsky normal form that generates all permutations of n symbols.at n=10A090328
• a(n) = 1 + (6 + (11 + (6 + n)*n)*n)*n/24.at n=35A145126
• Number of arrangements of 4 nonzero numbers x(i) in -n..n with the sum of floor(x(i)/x(i+1)) equal to zero.at n=14A189500