Least k > 1 such that tri(n)+ ... + tri(n+k-1) is a triangular number.

Terms

a(0) =2a(1) =3a(2) =5a(3) =17a(4) =7a(5) =2a(6) =89a(7) =125a(8) =3a(9) =215a(10) =269a(11) =13a(12) =10a(13) =8a(14) =11a(15) =27a(16) =719a(17) =815a(18) =21a(19) =57a(20) =316a(21) =11a(22) =26a(23) =1517a(24) =17a(25) =1799a(26) =30a(27) =26a(28) =7a(29) =5