a(6n+k) = 3a(6n+k-1)-3a(6n+k-2)+2a(6n+k-3), k = 0, 1, 3, 4, 5; a(6n+2) = 3a(6n+1)-3a(6n). a(0) = a(1) = 0, a(2) = 1.

A132658

a(6n+k) = 3a(6n+k-1)-3a(6n+k-2)+2a(6n+k-3), k = 0, 1, 3, 4, 5; a(6n+2) = 3a(6n+1)-3a(6n). a(0) = a(1) = 0, a(2) = 1.

Terms

    a(0) =0a(1) =0a(2) =1a(3) =3a(4) =6a(5) =11a(6) =21a(7) =42a(8) =63a(9) =105a(10) =210a(11) =441a(12) =903a(13) =1806a(14) =2709a(15) =4515a(16) =9030a(17) =18963a(18) =38829a(19) =77658a(20) =116487a(21) =194145a(22) =388290a(23) =815409a(24) =1669647a(25) =3339294a(26) =5008941a(27) =8348235a(28) =16696470a(29) =35062587

External references