Sum of coefficients of polynomials defined in comments lines.

Terms

a(0) =1a(1) =2a(2) =4a(3) =9a(4) =20a(5) =44a(6) =96a(7) =209a(8) =455a(9) =991a(10) =2159a(11) =4704a(12) =10249a(13) =22330a(14) =48651a(15) =105997a(16) =230938a(17) =503150a(18) =1096225a(19) =2388372a(20) =5203604a(21) =11337218a(22) =24700671a(23) =53815949a(24) =117250109a(25) =255455647a(26) =556567394a(27) =1212606837a(28) =2641935832a(29) =5756049469