a(0)=1; for n>0, a(n) = a(n-1)*n+1 if n is even, (a(n-1)+1)*n otherwise.
A344262
a(0)=1; for n>0, a(n) = a(n-1)*n+1 if n is even, (a(n-1)+1)*n otherwise.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =18a(4) =73a(5) =370a(6) =2221a(7) =15554a(8) =124433a(9) =1119906a(10) =11199061a(11) =123189682a(12) =1478276185a(13) =19217590418a(14) =269046265853
External references
- oeis: A344262