a(n) = T(2n,n+1), where T is the array defined in A025177.
A025188
a(n) = T(2n,n+1), where T is the array defined in A025177.
Terms
- a(0) =2a(1) =10a(2) =60a(3) =343a(4) =1968a(5) =11319a(6) =65351a(7) =378690a(8) =2201772a(9) =12839896a(10) =75076505a(11) =440016174a(12) =2584289200a(13) =15206283135a(14) =89625150180a(15) =529040216175
External references
- oeis: A025188