a(n) = ((1+4*sqrt(2))*(3+2*sqrt(2))^n + (1-4*sqrt(2))*(3-2*sqrt(2))^n)/2.
A164604
a(n) = ((1+4*sqrt(2))*(3+2*sqrt(2))^n + (1-4*sqrt(2))*(3-2*sqrt(2))^n)/2.
Terms
- a(0) =1a(1) =19a(2) =113a(3) =659a(4) =3841a(5) =22387a(6) =130481a(7) =760499a(8) =4432513a(9) =25834579a(10) =150574961a(11) =877615187a(12) =5115116161a(13) =29813081779a(14) =173763374513
External references
- oeis: A164604