a(n) = (F(n) + F(4*n))/2, where F=A000045 (the Fibonacci sequence).
A049671
a(n) = (F(n) + F(4*n))/2, where F=A000045 (the Fibonacci sequence).
Terms
- a(0) =0a(1) =2a(2) =11a(3) =73a(4) =495a(5) =3385a(6) =23188a(7) =158912a(8) =1089165a(9) =7465193a(10) =51167105a(11) =350704411a(12) =2403763560a(13) =16475640166a(14) =112925717047a(15) =774004378265
External references
- oeis: A049671