a(n) = 2^floor((2-n)/2)*Sum_{0 <= k <= n and A337966(n, k) < 0} A173018(n, k).
A338000
a(n) = 2^floor((2-n)/2)*Sum_{0 <= k <= n and A337966(n, k) < 0} A173018(n, k).
Terms
- a(0) =0a(1) =0a(2) =2a(3) =4a(4) =1a(5) =1a(6) =151a(7) =604a(8) =1135a(9) =3652a(10) =163921a(11) =983020a(12) =4781635a(13) =26455096a(14) =880441381a(15) =7019296864a(16) =62338135855a(17) =485246558272
External references
- oeis: A338000