a(n) = T(n,n-4), array T as in A055801.

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =3a(5) =5a(6) =8a(7) =12a(8) =19a(9) =26a(10) =40a(11) =51a(12) =76a(13) =92a(14) =133a(15) =155a(16) =218a(17) =247a(18) =339a(19) =376a(20) =505a(21) =551a(22) =726a(23) =782a(24) =1013a(25) =1080a(26) =1378a(27) =1457a(28) =1834a(29) =1926