The number of ordered ways to achieve a score of n in American football.

Terms

a(0) =1a(1) =0a(2) =1a(3) =1a(4) =1a(5) =2a(6) =3a(7) =4a(8) =6a(9) =9a(10) =12a(11) =18a(12) =26a(13) =37a(14) =54a(15) =78a(16) =112a(17) =162a(18) =234a(19) =337a(20) =487a(21) =703a(22) =1014a(23) =1464a(24) =2113a(25) =3049a(26) =4401a(27) =6352a(28) =9167a(29) =13231