A026292 a(n) = T(2n,n), where T is the array in A026268.

1, 1, 5, 27, 145, 796, 4438, 25034, 142479, 816620, 4706977, 27256963, 158450461, 924129535, 5404960900, 31689099660, 186188338689, 1096001511849, 6462416487070, 38161656273410, 225653893420214, 1335936968552131, 7917871096128978, 46975164555309282, 278951672249192025

Offset: 0

Author

Clark Kimberling

Keywords

• nonn

Extensions

Corrected and extended by Sean A. Irvine, Sep 24 2019