Left side of the triangle A075652.

Terms

a(0) =1a(1) =2a(2) =3a(3) =7a(4) =8a(5) =14a(6) =22a(7) =31a(8) =40a(9) =60a(10) =82a(11) =83a(12) =108a(13) =162a(14) =205a(15) =221a(16) =222a(17) =342a(18) =379a(19) =399a(20) =421a(21) =508a(22) =597a(23) =669a(24) =718a(25) =894a(26) =947a(27) =727a(28) =1183a(29) =1300