A026295 a(n) = T(2n,n-1), where T is the array in A026268.

1, 3, 14, 72, 385, 2110, 11757, 66298, 377245, 2161771, 12458186, 72130114, 419239101, 2444741300, 14296415880, 83807317674, 492339686501, 2897788821746, 17084275066796, 100873614561368

Offset: 1

Author

Clark Kimberling

Keywords

• nonn