A Fielder sequence.

Terms

a(0) =1a(1) =1a(2) =4a(3) =9a(4) =16a(5) =28a(6) =43a(7) =73a(8) =130a(9) =226a(10) =386a(11) =660a(12) =1132a(13) =1947a(14) =3349a(15) =5753a(16) =9878a(17) =16966a(18) =29147a(19) =50074a(20) =86020a(21) =147764a(22) =253829a(23) =436036a(24) =749041a(25) =1286728a(26) =2210377a(27) =3797047a(28) =6522681a(29) =11204863