A026968 a(n) = Sum_{k=0..n-2} T(n,k) * T(n,k+2), with T given by A026637.

1, 8, 41, 208, 856, 3552, 14172, 56462, 223292, 881656, 3475141, 13688112, 53891760, 212145608, 835111160, 3287779006, 12946154944, 50989472460, 200879577216, 791617503410, 3120501139160, 12304529289928, 48533074308046, 191488113441258, 755744827552836, 2983563960355832

Offset: 2

Author

Clark Kimberling

Keywords

• nonn

Extensions

More terms from Sean A. Irvine, Oct 20 2019