Numbers k such that 1 + Sum_{i=1..k-1} A001223(i)*(-1)^i = 0.

Terms

a(0) =2a(1) =4a(2) =14a(3) =22a(4) =28a(5) =233a(6) =249a(7) =261a(8) =488a(9) =497a(10) =511a(11) =515a(12) =519a(13) =526a(14) =531a(15) =534a(16) =548a(17) =562a(18) =620a(19) =633a(20) =635a(21) =2985a(22) =3119a(23) =3123a(24) =3128a(25) =3157a(26) =4350a(27) =4358a(28) =4392a(29) =4438