Least nondecreasing sequence with a(1) = 1 and Hankel transform {1,1,1,1,...}.

Terms

a(0) =1a(1) =1a(2) =2a(3) =2a(4) =5a(5) =5a(6) =15a(7) =15a(8) =51a(9) =51a(10) =188a(11) =188a(12) =731a(13) =731a(14) =2950a(15) =2950a(16) =12235a(17) =12235a(18) =51822a(19) =51822a(20) =223191a(21) =223191a(22) =974427a(23) =974427a(24) =4302645a(25) =4302645a(26) =19181100a(27) =19181100a(28) =86211885a(29) =86211885