a(n) = 6*a(n-1)-6*a(n-2) for n > 1; a(0) = 5, a(1) = 18.

A162814

a(n) = 6*a(n-1)-6*a(n-2) for n > 1; a(0) = 5, a(1) = 18.

Terms

    a(0) =5a(1) =18a(2) =78a(3) =360a(4) =1692a(5) =7992a(6) =37800a(7) =178848a(8) =846288a(9) =4004640a(10) =18950112a(11) =89672832a(12) =424336320a(13) =2007980928a(14) =9501867648a(15) =44963320320a(16) =212768716032

External references