Irregular triangle read by rows: coefficients of polynomials V_n(x), highest degree terms first.

Terms

a(0) =1a(1) =1a(2) =-1a(3) =1a(4) =-3a(5) =1a(6) =-7a(7) =1a(8) =1a(9) =-15a(10) =5a(11) =1a(12) =-31a(13) =17a(14) =-1a(15) =1a(16) =-63a(17) =49a(18) =-7a(19) =1a(20) =-127a(21) =129a(22) =-31a(23) =1a(24) =1a(25) =-255a(26) =321a(27) =-111a(28) =9a(29) =1