Dimensions of certain Lie algebra (see reference for precise definition).

Terms

a(0) =1a(1) =35a(2) =405a(3) =2695a(4) =12740a(5) =47628a(6) =149940a(7) =413820a(8) =1029105a(9) =2351635a(10) =5010005a(11) =10061415a(12) =19211920a(13) =35119280a(14) =61799760a(15) =105163632a(16) =173707785a(17) =279397755a(18) =438775645a(19) =674334815a(20) =1016206884a(21) =1504211500a(22) =2190324500a(23) =3141625500a(24) =4443791625a(25) =6205210011a(26) =8561787885