a(n) = 6*a(n-1) + 3*a(n-2) for n > 2, a(0)=1, a(1)=6.
A090018
a(n) = 6*a(n-1) + 3*a(n-2) for n > 2, a(0)=1, a(1)=6.
Terms
- a(0) =1a(1) =6a(2) =39a(3) =252a(4) =1629a(5) =10530a(6) =68067a(7) =439992a(8) =2844153a(9) =18384894a(10) =118841823a(11) =768205620a(12) =4965759189a(13) =32099171994a(14) =207492309531
External references
- oeis: A090018