Numerators of the column sums of the EG1 matrix coefficients.

Terms

a(0) =3a(1) =15a(2) =35a(3) =315a(4) =693a(5) =1001a(6) =6435a(7) =109395a(8) =230945a(9) =969969a(10) =2028117a(11) =16900975a(12) =35102025a(13) =145422675a(14) =20036013a(15) =9917826435a(16) =20419054425a(17) =27981667175a(18) =172308161025a(19) =282585384081a(20) =964378691705