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Template:Sequence of the Day for November 30

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Intended for: November 30, 2011

Timetable

  • First draft entered by Alonso del Arte on August 28, 2011
  • Draft to be reviewed by September 30, 2011
  • Draft to be approved by October 30, 2011
Yesterday's SOTD * Tomorrow's SOTD

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A051682: 
11
-gonal numbers,
9 n 2  −  7n
2
.
{ 1, 11, 30, 58, 95, 141, 196, ... }

T. D. Noe has proved that there are no 11-gonal numbers greater than 1 that are also triangular numbers.