Numbers in A249406 that are not of the form m*(m+1).

Terms

a(0) =1a(1) =399a(2) =8099a(3) =33123a(4) =93635a(5) =159200a(6) =256035a(7) =492803a(8) =864899a(9) =1416099a(10) =2196323a(11) =3261635a(12) =4674243a(13) =6502499a(14) =8820899a(15) =12531599a(16) =16257023a(17) =20757135a(18) =26132543a(19) =32489999a(20) =39942399a(21) =48608783a(22) =58614335a(23) =65593800a(24) =73205135a(25) =86713343a(26) =102009999a(27) =119246399a(28) =138579983