A026912 T(2n-1,n-1), T given by A026907.

13, 90, 370, 1403, 5256, 19749, 74628, 283551, 1082440, 4148594, 15953598, 61526960, 237876562, 921678867, 3577968072, 13913243127, 54184698792, 211307360862, 825059443542, 3225071709972, 12619275028602, 49423455006492

Offset

1,1

Links

Table of n, a(n) for n=1..22.

Crossrefs

Sequence in context: A282858 A268746 A152867 * A161465 A162300 A161859

Adjacent sequences: A026909 A026910 A026911 * A026913 A026914 A026915

Keyword

nonn

Author

Clark Kimberling

Status

approved