Sum_{k=0..n-3} T(n,k) * T(n,k+3), with T given by A026703.
A027255
Sum_{k=0..n-3} T(n,k) * T(n,k+3), with T given by A026703.
Terms
- a(0) =1a(1) =12a(2) =97a(3) =618a(4) =3841a(5) =21050a(6) =119447a(7) =615402a(8) =3346316a(9) =16708316a(10) =88765368a(11) =435341688a(12) =2280888072a(13) =11063821616a(14) =57457039508a(15) =276725405106
External references
- oeis: A027255