Least m > 0 such that prime(n)*triangular(m) is a triangular number, or 0 if no such m exists.

Terms

a(0) =2a(1) =1a(2) =2a(3) =2a(4) =3a(5) =3a(6) =12a(7) =4a(8) =9a(9) =5a(10) =5a(11) =30a(12) =6a(13) =6a(14) =20a(15) =14a(16) =230a(17) =23a(18) =24a(19) =8a(20) =8a(21) =35a(22) =36a(23) =9a(24) =29a(25) =90a(26) =30a(27) =434a(28) =10a(29) =159