a(n) is the greatest integer such that binomial(a(n),n)*2^(1 - binomial(n,2)) < 1.

Terms

a(0) =0a(1) =1a(2) =3a(3) =6a(4) =11a(5) =17a(6) =27a(7) =42a(8) =65a(9) =100a(10) =152a(11) =231a(12) =349a(13) =527a(14) =792a(15) =1186a(16) =1771a(17) =2639a(18) =3923a(19) =5817a(20) =8609a(21) =12715a(22) =18747a(23) =27595a(24) =40557a(25) =59522a(26) =87239a(27) =127704a(28) =186721a(29) =272717