Euler(n)*Fibonacci(n+1) - n!.

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =1a(5) =8a(6) =73a(7) =672a(8) =6770a(9) =73600a(10) =867569a(11) =11029248a(12) =150742645a(13) =2205811712a(14) =34431907210a(15) =571334098944