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A026912
T(2n-1,n-1), T given by A026907.
0
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
CROSSREFS
Sequence in context: A282858 A268746 A152867 * A161465 A162300 A161859
KEYWORD
nonn
STATUS
approved