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

1,1

Links

Table of n, a(n) for n=1..21.

Crossrefs

Sequence in context: A277614 A082245 A158033 * A236696 A262259 A203492

Adjacent sequences: A027156 A027157 A027158 * A027160 A027161 A027162

Keyword

nonn

Author

Clark Kimberling

Status

approved