Least integer m such that between m and 2m there are n triangular numbers.

Terms

a(0) =1a(1) =3a(2) =14a(3) =28a(4) =53a(5) =77a(6) =105a(7) =150a(8) =189a(9) =248a(10) =298a(11) =371a(12) =431a(13) =495a(14) =588a(15) =663a(16) =770a(17) =856a(18) =946a(19) =1073a(20) =1173a(21) =1314a(22) =1425a(23) =1580a(24) =1702a(25) =1828a(26) =2003a(27) =2139a(28) =2328a(29) =2475