a(n) = A077211(n)^(1/2).

Terms

a(0) =1a(1) =2a(2) =3a(3) =6a(4) =13a(5) =30a(6) =74a(7) =196a(8) =555a(9) =1666a(10) =5269a(11) =17476a(12) =60539a(13) =218277a(14) =816718a(15) =3163136a(16) =12652545a(17) =52167780a(18) =221329146a(19) =964751381a(20) =4314499339a(21) =19771519807a(22) =92736648099a(23) =444749340320