a(n) = a(n-2) + a(n-3) + a(n-4) - a(n-6), with a(0) = a(2) = a(3) = 1, a(1) = 0 and a(4) = a(5) = 2.
A143438
a(n) = a(n-2) + a(n-3) + a(n-4) - a(n-6), with a(0) = a(2) = a(3) = 1, a(1) = 0 and a(4) = a(5) = 2.
Terms
- a(0) =1a(1) =0a(2) =1a(3) =1a(4) =2a(5) =2a(6) =3a(7) =5a(8) =6a(9) =9a(10) =12a(11) =18a(12) =24a(13) =34a(14) =48a(15) =67a(16) =94a(17) =131a(18) =185a(19) =258a(20) =362a(21) =507a(22) =711a(23) =996a(24) =1395a(25) =1956a(26) =2740a(27) =3840a(28) =5380a(29) =7540
External references
- oeis: A143438