a(n) = 4*((n-1)! + 1) + n (mod n*(n + 2)).

Terms

a(0) =0a(1) =2a(2) =0a(3) =8a(4) =0a(5) =10a(6) =56a(7) =12a(8) =22a(9) =14a(10) =0a(11) =16a(12) =182a(13) =18a(14) =34a(15) =20a(16) =0a(17) =22a(18) =380a(19) =24a(20) =46a(21) =26a(22) =552a(23) =28a(24) =29a(25) =30a(26) =58a(27) =32a(28) =0a(29) =34