Coefficient triangle of certain polynomials N(4; m,x).

Terms

a(0) =1a(1) =1a(2) =5a(3) =1a(4) =12a(5) =15a(6) =1a(7) =21a(8) =63a(9) =35a(10) =1a(11) =32a(12) =168a(13) =224a(14) =70a(15) =1a(16) =45a(17) =360a(18) =840a(19) =630a(20) =126a(21) =1a(22) =60a(23) =675a(24) =2400a(25) =3150a(26) =1512a(27) =210a(28) =1a(29) =77