a(n) is the smallest n-gonal pyramidal number with binary weight n.

Terms

a(0) =35a(1) =30a(2) =405a(3) =95a(4) =6860a(5) =765a(6) =28855a(7) =7923a(8) =96760a(9) =380091a(10) =259064a(11) =915915a(12) =3845501a(13) =1436415a(14) =32471830a(15) =11992255a(16) =62904941a(17) =182171613a(18) =266182382a(19) =670936891a(20) =939382515a(21) =2533347310a(22) =30530860911a(23) =1876688877a(24) =16972115903a(25) =201845686175a(26) =529756691451a(27) =409027868651