64664

Appears in sequences

• a(n) = floor(binomial(n,10)/10).at n=22A011856
• a(n) = Sum_{1 <= x, y <= n} lcm(x, y).at n=23A064951
• 5-almost primes with semiprime digits (digits 4, 6, 9 only).at n=23A111697
• Number of binary arrays of length n+13 with fewer than 7 ones in any length 14 subsequence (=less than 50% duty cycle).at n=4A213117
• Number of binary arrays of length 2*n+4 with fewer than n ones in any length 2n subsequence (=less than 50% duty cycle).at n=6A213122
• Number of length n+3 0..2 arrays with at most one downstep in every n consecutive neighbor pairs.at n=17A255110
• a(n) = floor(n!*(3*floor(n/2)!*ceiling(n/2)! + 3*floor((n+2)/2)!*ceiling((n-2)/2)! - 6*floor(n/2)!*ceiling((n-2)/2)!)^(-1)).at n=18A366109