a(n) = Sum_{k=0..n*(n-1)/2} A227543(n,k)^2 for n >= 0.
A376527
a(n) = Sum_{k=0..n*(n-1)/2} A227543(n,k)^2 for n >= 0.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =7a(4) =34a(5) =216a(6) =1610a(7) =13461a(8) =122254a(9) =1183568a(10) =12054498a(11) =127960158a(12) =1405852350a(13) =15901061916a(14) =184381675404
External references
- oeis: A376527