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A033704 Fancy primitive repdigit polygonal numbers. 1

%I #13 Oct 30 2013 21:46:49

%S 6,9,22,55,66,88,111,222,333,444,555,666,777,888,6666,44444,111111,

%T 777777,999999,111111111,777777777,9999999999,333333333333,

%U 555555555555,1111111111111,888888888888888,1111111111111111,2222222222222222,3333333333333333

%N Fancy primitive repdigit polygonal numbers.

%H Robert G. Wilson v, <a href="/A033704/b033704.txt">Table of n, a(n) for n = 1..53</a> (from Keith's paper)

%H M. Keith, <a href="https://cs.uwaterloo.ca/journals/JIS/keith.html">On Repdigit Polygonal Numbers</a>, J. Integer Sequences, Vol. 1, 1998, #6.

%Y Cf. A033705, A033706, A033707.

%K nonn

%O 1,1

%A Mike Keith (domnei(AT)aol.com)

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Last modified March 28 10:55 EDT 2024. Contains 371241 sequences. (Running on oeis4.)