a(1) = 1, a(2) = 7, a(n+2) = 7*a(n+1)+(n+1)*(n+3)*a(n).
A142990
a(1) = 1, a(2) = 7, a(n+2) = 7*a(n+1)+(n+1)*(n+3)*a(n).
Terms
- a(0) =1a(1) =7a(2) =57a(3) =504a(4) =4896a(5) =51912a(6) =598392a(7) =7459200a(8) =100085760a(9) =1439061120a(10) =22083719040a(11) =360371773440
External references
- oeis: A142990