A026618 T(2n,n-2), T given by A026615.

1, 11, 50, 212, 870, 3509, 14014, 55640, 220116, 868870, 3425092, 13491064, 53117350, 209097945, 823111350, 3240499440, 12759776700, 50254414650, 197979380220, 780170359800, 3075303389340

Offset

1,2

Links

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

Crossrefs

Sequence in context: A340130 A211920 A167423 * A266034 A026684 A181619

Adjacent sequences: A026615 A026616 A026617 * A026619 A026620 A026621

Keyword

nonn

Author

Clark Kimberling

Status

approved