a(0) = 1, a(1) = 1, a(2) = 2; for n > 2, a(n) = 5*a(n-1) - 5*a(n-2) + a(n-3).

A101879

a(0) = 1, a(1) = 1, a(2) = 2; for n > 2, a(n) = 5*a(n-1) - 5*a(n-2) + a(n-3).

Terms

    a(0) =1a(1) =1a(2) =2a(3) =6a(4) =21a(5) =77a(6) =286a(7) =1066a(8) =3977a(9) =14841a(10) =55386a(11) =206702a(12) =771421a(13) =2878981a(14) =10744502a(15) =40099026a(16) =149651601a(17) =558507377a(18) =2084377906a(19) =7779004246a(20) =29031639077a(21) =108347552061a(22) =404358569166

External references