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A033706 Values of k associated with A033705. 3
3, 4, 5, 3, 3, 16, 38, 9, 75, 11, 149, 186, 3, 260, 297, 9, 1589, 531, 131, 1475, 514, 41139, 21604940, 65359479, 170677592, 933706818, 5378862, 806321563, 360633274, 199660579, 3220611916266, 63890006966, 975514583945, 8944083 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
M. Keith, On Repdigit Polygonal Numbers, J. Integer Sequences, Vol. 1, 1998, #6.
EXAMPLE
A033705(1) = 6, and 6 is triangular (3 sides), so a(1)=3.
A033705(2) = 9, and 9 is square (4 sides), so a(2)=4.
CROSSREFS
Sequence in context: A337535 A163874 A165565 * A354597 A121890 A330740
KEYWORD
nonn
AUTHOR
Mike Keith (domnei(AT)aol.com)
STATUS
approved

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Last modified April 20 17:12 EDT 2024. Contains 371845 sequences. (Running on oeis4.)