A027996 a(n)=Sum{T(n,k)*T(n,k+2)}, 0<=k<=2n-2, T given by A027926.

6, 26, 106, 424, 1684, 6667, 26352, 104069, 410806, 1621325, 6398688, 25254823, 99691822, 393600358, 1554333406, 6139498384, 24256359424, 95857063972, 378903471934, 1498090689910, 5924490920776, 23435015022946, 92721024432286

Offset

2,1

Links

Table of n, a(n) for n=2..24.

Crossrefs

Sequence in context: A254317 A037545 A371438 * A020989 A079675 A113991

Adjacent sequences: A027993 A027994 A027995 * A027997 A027998 A027999

Keyword

nonn

Author

Clark Kimberling

Status

approved