Sequence is {a(4,n)}, where a(m,n) is defined at sequence A111518.

Terms

a(0) =1a(1) =4a(2) =7a(3) =4a(4) =-4a(5) =-5a(6) =-49a(7) =-200a(8) =59a(9) =10a(10) =-5240a(11) =11936a(12) =30806a(13) =-412987a(14) =1352862a(15) =3166014a(16) =-57455111a(17) =263800403a(18) =200944299a(19) =-11339467789a(20) =77531515035a(21) =-118123511262