Sums of antidiagonals in A297359.

Terms

a(0) =1a(1) =2a(2) =4a(3) =8a(4) =18a(5) =34a(6) =68a(7) =140a(8) =280a(9) =556a(10) =1114a(11) =2232a(12) =4468a(13) =8932a(14) =17860a(15) =35718a(16) =71446a(17) =142900a(18) =285800a(19) =571592a(20) =1143174a(21) =2286348a(22) =4572708a(23) =9145434a(24) =18290876a(25) =36581744a(26) =73163470a(27) =146326928a(28) =292653860a(29) =585307730