SOLUTION: Please Help Generate a formula for the nth Octagonal number by relating to one or more figurate numbers with fewer than seven sides(by relating to hexagonal, pentagonal, square, o

SOLUTION: Please Help Generate a formula for the nth Octagonal number by relating to one or more figurate numbers with fewer than seven sides(by relating to hexagonal, pentagonal, square, o

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Question 973153: Please Help
Generate a formula for the nth Octagonal number by relating to one or more figurate numbers with fewer than seven sides(by relating to hexagonal, pentagonal, square, oblong or triangular numbers).

Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!

Triangle:

Square:

Pentagonal:

Hexagonal:

Heptagonal:

The pattern looks like octagonal should be

And that is indeed the correct formula.

John

My calculator said it, I believe it, that settles it

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