A185253(n) is the a(n)-th triangular number.

Terms

a(0) =3a(1) =11a(2) =25a(3) =20a(4) =56a(5) =73a(6) =51a(7) =42a(8) =49a(9) =183a(10) =117a(11) =406a(12) =532a(13) =602a(14) =356a(15) =325a(16) =842a(17) =144a(18) =164a(19) =900a(20) =119a(21) =1406a(22) =1630a(23) =1011a(24) =1156a(25) =935a(26) =2050a(27) =2000a(28) =2222a(29) =2541