a(n) = L(n) * L(n+1) * L(n+2) / 2, where L(n) = Lucas number (A000032).
A085696
a(n) = L(n) * L(n+1) * L(n+2) / 2, where L(n) = Lucas number (A000032).
Terms
- a(0) =3a(1) =6a(2) =42a(3) =154a(4) =693a(5) =2871a(6) =12267a(7) =51794a(8) =219678a(9) =930126a(10) =3940797a(11) =16692319a(12) =70711683a(13) =299536446a(14) =1268861682a(15) =5374976354a(16) =22768778133a(17) =96450071031a(18) =408569091147
External references
- oeis: A085696