Central coefficients of number triangle A185962.

Terms

a(0) =1a(1) =-2a(2) =0a(3) =8a(4) =-10a(5) =-30a(6) =98a(7) =40a(8) =-648a(9) =680a(10) =3058a(11) =-8712a(12) =-6760a(13) =65674a(14) =-52710a(15) =-348128a(16) =856358a(17) =1011330a(18) =-7116754a(19) =3891920a(20) =41214978a(21) =-87043088a(22) =-143941360a(23) =793389048a(24) =-224365750a(25) =-4961373872a(26) =8914590594a(27) =19893652520a(28) =-89559777800a(29) =540262170