Column 2 of triangle A091602.

Terms

a(0) =1a(1) =0a(2) =2a(3) =2a(4) =3a(5) =4a(6) =7a(7) =8a(8) =12a(9) =15a(10) =21a(11) =26a(12) =35a(13) =43a(14) =57a(15) =70a(16) =89a(17) =109a(18) =138a(19) =167a(20) =208a(21) =251a(22) =309a(23) =371a(24) =452a(25) =539a(26) =652a(27) =775a(28) =929a(29) =1099