Integers m such that A006218(m) is triangular.

Terms

a(0) =1a(1) =2a(2) =5a(3) =15a(4) =20a(5) =26a(6) =55a(7) =68a(8) =92a(9) =108a(10) =150a(11) =156a(12) =336a(13) =346a(14) =364a(15) =423a(16) =563a(17) =586a(18) =682a(19) =798a(20) =866a(21) =951a(22) =1194a(23) =1734a(24) =1888a(25) =2790a(26) =3102a(27) =3150a(28) =3506a(29) =4210