Analog of A085635, replacing "quadratic residue" (X^2) with "value of X^2+X".

Terms

a(0) =1a(1) =2a(2) =6a(3) =10a(4) =14a(5) =18a(6) =30a(7) =42a(8) =66a(9) =70a(10) =90a(11) =126a(12) =198a(13) =210a(14) =330a(15) =390a(16) =450a(17) =630a(18) =990a(19) =1170a(20) =1386a(21) =1638a(22) =2142a(23) =2310a(24) =2730a(25) =3150a(26) =4950a(27) =5850a(28) =6930a(29) =8190