Coefficient of q^4 in the polynomial NT_{n,mu}(q).

Terms

a(0) =2a(1) =23a(2) =135a(3) =561a(4) =1870a(5) =5328a(6) =13476a(7) =31020a(8) =66132a(9) =132275a(10) =250679a(11) =453609a(12) =788580a(13) =1323688a(14) =2154240a(15) =3410880a(16) =5269422a(17) =7962615a(18) =11794079a(19) =17154665a(20) =24541506a(21) =34580040a(22) =48049300a(23) =65910780a(24) =89341200a(25) =119769507a(26) =158918463a(27) =208851185a(28) =272023016a(29) =351339120