a(n) = 6*a(n - 1) - 12*a(n - 2) + 8*a(n - 3) for n >= 5, a(0) = 1, a(1) = 7, a(2) = 24, a(3) = 70, a(4) = 193.

A339254

a(n) = 6*a(n - 1) - 12*a(n - 2) + 8*a(n - 3) for n >= 5, a(0) = 1, a(1) = 7, a(2) = 24, a(3) = 70, a(4) = 193.

Terms

    a(0) =1a(1) =7a(2) =24a(3) =70a(4) =193a(5) =510a(6) =1304a(7) =3248a(8) =7920a(9) =18976a(10) =44800a(11) =104448a(12) =240896a(13) =550400a(14) =1247232a(15) =2805760a(16) =6270976a(17) =13934592a(18) =30801920a(19) =67764224a(20) =148439040a(21) =323878912a(22) =704118784a(23) =1525678080a(24) =3295674368a(25) =7098859520a(26) =15250489344a(27) =32682016768a(28) =69877104640a(29) =149082341376

External references