Records of first differences of A166944.

Terms

a(0) =2a(1) =3a(2) =7a(3) =13a(4) =43a(5) =139a(6) =313a(7) =661a(8) =1321a(9) =2659a(10) =5419a(11) =10891a(12) =22039a(13) =44383a(14) =88801a(15) =177841a(16) =355723a(17) =713833a(18) =1427749a(19) =2860771a(20) =5725453a(21) =11461141a(22) =22933441a(23) =45895573a(24) =91793059a(25) =183616423a(26) =367232911a(27) =734482123a(28) =1468965061a(29) =2937930211