a(n) = 3*a(n-1) + 6*a(n-2) + a(n-3) with a(0)=2, a(1)=5, a(2)=26.

A214951

a(n) = 3*a(n-1) + 6*a(n-2) + a(n-3) with a(0)=2, a(1)=5, a(2)=26.

Terms

    a(0) =2a(1) =5a(2) =26a(3) =110a(4) =491a(5) =2159a(6) =9533a(7) =42044a(8) =185489a(9) =818264a(10) =3609770a(11) =15924383a(12) =70250033a(13) =309906167a(14) =1367143082a(15) =6031116281a(16) =26606113502a(17) =117372181274a(18) =517784341115

External references