a(n) = ((5 + sqrt(18))*(4 + sqrt(8))^n + (5 - sqrt(18))*(4 - sqrt(8))^n)/2.
A164594
a(n) = ((5 + sqrt(18))*(4 + sqrt(8))^n + (5 - sqrt(18))*(4 - sqrt(8))^n)/2.
Terms
- a(0) =5a(1) =32a(2) =216a(3) =1472a(4) =10048a(5) =68608a(6) =468480a(7) =3198976a(8) =21843968a(9) =149159936a(10) =1018527744a(11) =6954942464a(12) =47491317760a(13) =324291002368
External references
- oeis: A164594