a(n) = a(n-2) + a(n-3) + a(n-4) + a(n-5) + a(n-6) + a(n-7).

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =6a(8) =6a(9) =11a(10) =16a(11) =26a(12) =41a(13) =66a(14) =106a(15) =166a(16) =266a(17) =421a(18) =671a(19) =1066a(20) =1696a(21) =2696a(22) =4286a(23) =6816a(24) =10836a(25) =17231a(26) =27396a(27) =43561a(28) =69261a(29) =110126