Smith triangular numbers.

Terms

a(0) =378a(1) =666a(2) =861a(3) =2556a(4) =5253a(5) =7503a(6) =10296a(7) =16653a(8) =27261a(9) =28920a(10) =29890a(11) =32896a(12) =46056a(13) =72771a(14) =84255a(15) =85905a(16) =92235a(17) =94395a(18) =120786a(19) =132870a(20) =141778a(21) =157641a(22) =215496a(23) =328455a(24) =345696a(25) =385881a(26) =386760a(27) =396495a(28) =424581a(29) =529935