An inverse Chebyshev transform of (1-x)/(1-2x).

Terms

a(0) =1a(1) =1a(2) =4a(3) =7a(4) =22a(5) =46a(6) =130a(7) =295a(8) =790a(9) =1870a(10) =4864a(11) =11782a(12) =30148a(13) =73984a(14) =187534a(15) =463687a(16) =1168870a(17) =2902870a(18) =7293640a(19) =18161170a(20) =45541492a(21) =113576596a(22) =284470564a(23) =710118262a(24) =1777323772a(25) =4439253196a(26) =11105933440a(27) =27749232700a(28) =69403169200