a(n) = 7*a(n-1) - 9*a(n-2) + a(n-3) with a(0)=3, a(1)=7, a(2)=31.

A141385

a(n) = 7*a(n-1) - 9*a(n-2) + a(n-3) with a(0)=3, a(1)=7, a(2)=31.

Terms

    a(0) =3a(1) =7a(2) =31a(3) =157a(4) =827a(5) =4407a(6) =23563a(7) =126105a(8) =675075a(9) =3614143a(10) =19349431a(11) =103593805a(12) =554625899a(13) =2969386479a(14) =15897666067a(15) =85113810057a(16) =455687062275

External references