A033706 - OEIS

%I #9 Jul 06 2024 11:54:31

%S 3,4,5,3,3,16,38,9,75,11,149,186,3,260,297,9,1589,531,131,1475,514,

%T 41139,21604940,65359479,170677592,933706818,5378862,806321563,

%U 360633274,199660579,3220611916266,63890006966,975514583945,8944083

%N Values of k associated with A033705.

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

%e A033705(1) = 6, and 6 is triangular (3 sides), so a(1)=3.

%e A033705(2) = 9, and 9 is square (4 sides), so a(2)=4.

%Y Cf. A033705, A033707.

%K nonn

%O 1,1

%A _Mike Keith_