Number of ordered biquanimous partitions of 2n.

Terms

a(0) =1a(1) =1a(2) =5a(3) =23a(4) =105a(5) =449a(6) =1902a(7) =7828a(8) =31976a(9) =129200a(10) =520425a(11) =2088217a(12) =8371186a(13) =33514797a(14) =134140430a(15) =536699674a(16) =2147154667a(17) =8589198795a(18) =34358341823a(19) =137435830265a(20) =549749857574