The fourth left hand column of triangle A167565.

Terms

a(0) =0a(1) =14a(2) =124a(3) =601a(4) =2120a(5) =6096a(6) =15168a(7) =33858a(8) =69432a(9) =132990a(10) =240812a(11) =415987a(12) =690352a(13) =1106768a(14) =1721760a(15) =2608548a(16) =3860496a(17) =5595006a(18) =7957884a(19) =11128205a(20) =15323704a(21) =20806720a(22) =27890720a(23) =36947430a(24) =48414600a(25) =62804430a(26) =80712684