The polygonal polynomials evaluated at x = -1/2 and normalized with (-2)^n.

Terms

a(0) =0a(1) =1a(2) =0a(3) =1a(4) =0a(5) =-3a(6) =8a(7) =-31a(8) =72a(9) =-195a(10) =448a(11) =-1071a(12) =2416a(13) =-5475a(14) =12120a(15) =-26719a(16) =58232a(17) =-126243a(18) =271824a(19) =-582575a(20) =1242720a(21) =-2640899a(22) =5592360a(23) =-11806239a(24) =24855080a(25) =-52195843a(26) =109362528a(27) =-228667311a(28) =477218512a(29) =-994205475