Sub-triangle of A008292: terms with square indices.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =4a(5) =1a(6) =11a(7) =1a(8) =26a(9) =1a(10) =1a(11) =57a(12) =57a(13) =1a(14) =120a(15) =1191a(16) =1a(17) =247a(18) =15619a(19) =1a(20) =502a(21) =156190a(22) =1a(23) =1013a(24) =1310354a(25) =1a(26) =1a(27) =2036a(28) =9738114a(29) =2036