Triangular numbers with internal digits 9.
0, 1, 3, 6, 10, 15, 21, 28, 36, 45, 55, 66, 78, 91, 190, 496, 595, 990, 599
1 seqfan posts
Sun Mar 15 02:46:16 CET 2009 [seqfan] A069693 .. A069700 (triangular numbers of the form abb...bc) are fini and full