a(n)=b(n,n) with b(n,1)=n and b(n,k)=binomial(b(n,k-1),d(n,n-k+1)) for 1<k<=n, where d(n,i) are the divisors of n, d(i)<d(j), 1<=i<j<=A000005(n).
A084678
a(n)=b(n,n) with b(n,1)=n and b(n,k)=binomial(b(n,k-1),d(n,n-k+1)) for 1<k<=n, where d(n,i) are the divisors of n, d(i)<d(j), 1<=i<j<=A000005(n).
Terms
- a(0) =1a(1) =2a(2) =3a(3) =6a(4) =5a(5) =190a(6) =7a(7) =2415a(8) =84a(9) =31626a(10) =11a(12) =13a(13) =5887596a(14) =4509005501a(16) =17
External references
- oeis: A084678