1,1

M. Keith, On Repdigit Polygonal Numbers, J. Integer Sequences, Vol. 1, 1998, #6.

Cf. A033705-A033707.

Sequence in context: A112393 A006132 A033705 this_sequence A121592 A034718 A084431

Adjacent sequences: A033701 A033702 A033703 this_sequence A033705 A033706 A033707

nonn

Mike Keith (domnei(AT)aol.com)