Dying rabbits: a(n) = a(n-1) + a(n-2) - a(n-12).

Terms

a(0) =0a(1) =1a(2) =1a(3) =2a(4) =3a(5) =5a(6) =8a(7) =13a(8) =21a(9) =34a(10) =55a(11) =89a(12) =144a(13) =232a(14) =375a(15) =605a(16) =977a(17) =1577a(18) =2546a(19) =4110a(20) =6635a(21) =10711a(22) =17291a(23) =27913a(24) =45060a(25) =72741a(26) =117426a(27) =189562a(28) =306011a(29) =493996