a(n) = (3*2^(4*n+3) + 1)/5.
A318236
a(n) = (3*2^(4*n+3) + 1)/5.
Terms
- a(0) =5a(1) =77a(2) =1229a(3) =19661a(4) =314573a(5) =5033165a(6) =80530637a(7) =1288490189a(8) =20615843021a(9) =329853488333
External references
- oeis: A318236
A318236
a(n) = (3*2^(4*n+3) + 1)/5.