a(n) = 4024*7^n/147 - 256/3 (n >= 2).
A304829
a(n) = 4024*7^n/147 - 256/3 (n >= 2).
Terms
- a(0) =1256a(1) =9304a(2) =65640a(3) =459992a(4) =3220456a(5) =22543704a(6) =157806440a(7) =1104645592a(8) =7732519656a(9) =54127638104a(10) =378893467240
External references
- oeis: A304829