n^2 * a(n) = 3*(5*n^2 - 5*n + 2) * a(n-1) - 16*(5*n^2 - 10*n + 6) * a(n-2) + 36*(5*n^2 - 15*n + 12) * a(n-3) - 144*(n-2)^2 * a(n-4), with a(0)=1, a(1)=6, a(2)=30, a(3)=144.
A276022
n^2 * a(n) = 3*(5*n^2 - 5*n + 2) * a(n-1) - 16*(5*n^2 - 10*n + 6) * a(n-2) + 36*(5*n^2 - 15*n + 12) * a(n-3) - 144*(n-2)^2 * a(n-4), with a(0)=1, a(1)=6, a(2)=30, a(3)=144.
Terms
- a(0) =1a(1) =6a(2) =30a(3) =144a(4) =690a(5) =3348a(6) =16536a(7) =83232a(8) =426618a(9) =2223180a(10) =11756052a(11) =62959680a(12) =340881792a(13) =1862954784a(14) =10262937600a(15) =56926831104a(16) =317632207194
External references
- oeis: A276022