Triangle interpolating between (-1)^n (A033999) and the swinging factorial function (A056040) restricted to odd indices (2n+1)$ (A002457), read by rows.

A163945

Triangle interpolating between (-1)^n (A033999) and the swinging factorial function (A056040) restricted to odd indices (2n+1)$ (A002457), read by rows.

Terms

    a(0) =1a(1) =-1a(2) =6a(3) =1a(4) =-12a(5) =30a(6) =-1a(7) =18a(8) =-90a(9) =140a(10) =1a(11) =-24a(12) =180a(13) =-560a(14) =630a(15) =-1a(16) =30a(17) =-300a(18) =1400a(19) =-3150a(20) =2772a(21) =1a(22) =-36a(23) =450a(24) =-2800a(25) =9450a(26) =-16632a(27) =12012a(28) =-1a(29) =42

External references