A026988 - OEIS

%I #11 Dec 31 2023 15:37:47

%S 1,10,69,340,1696,8774,44500,203884,998953,5026154,24474925,110862660,

%T 540493911,2706193730,13062307900,59214077236,288140818097,

%U 1439810493778,6934754735653,31544380215556,153401000364266,765589966351344,3686304297844080,16830906540844256,81840064308561274

%N a(n) = Sum_{k=0..n-2} T(n,k) * T(n,k+2), with T given by A026681.

%Y Cf. A026681.

%K nonn

%O 2,2

%A _Clark Kimberling_

%E More terms from _Sean A. Irvine_, Oct 21 2019