A027159 a(n) = T(2n,n-1), T given by A027157.
3, 10, 76, 264, 2208, 7744, 67776, 238720, 2144768, 7572480, 69203968, 244715520, 2263351296, 8012201984, 74764042240, 264873738240, 2488551997440, 8821831106560, 83334108020736, 295559851147264, 2804309838266368
Offset: 1