a(n) = Sum_{k=0..floor(n/2)} (k-1)^2*A106828(n, k).
A349959
a(n) = Sum_{k=0..floor(n/2)} (k-1)^2*A106828(n, k).
Terms
- a(0) =1a(1) =0a(2) =0a(3) =0a(4) =3a(5) =20a(6) =190a(7) =1764a(8) =17773a(9) =192632a(10) =2250036a(11) =28254600a(12) =380304639a(13) =5468906508a(14) =83750505826
External references
- oeis: A349959