1,1
M. Keith, On Repdigit Polygonal Numbers, J. Integer Sequences, Vol. 1, 1998, #6.
Cf. A033705-A033707.
Sequence in context: A099816 A099120 A016553 this_sequence A121890 A137926 A090395
Adjacent sequences: A033703 A033704 A033705 this_sequence A033707 A033708 A033709
nonn
Mike Keith (domnei(AT)aol.com)
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