Third column (m=3) of triangle A144886 (S1hat(4)).

A144889

Third column (m=3) of triangle A144886 (S1hat(4)).

Terms

    a(0) =1a(1) =4a(2) =36a(3) =264a(4) =2040a(5) =16000a(6) =149600a(7) =1362240a(8) =14326080a(9) =158438400a(10) =1931731200a(11) =25155648000a(12) =357727910400

External references