

A118367


Largest number that is not the sum of five ngonal numbers.


1



0, 0, 0, 26, 47, 188, 245, 343, 494, 821, 901, 1283, 1729, 1972, 2715, 3795, 4030, 4788, 5681, 6379, 6948, 9484, 9913, 10342, 10771, 14064, 15035, 19182, 19865, 20548, 27315, 28194, 29073, 29952, 33351, 34302, 35253, 50772, 52106, 53440, 54774
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OFFSET

3,4


COMMENTS

Legendre proved that a number N is the sum of five ngonal numbers if N >= 28(n2)^3. For odd n, four ngonal numbers are enough. See A118368.


REFERENCES

Melvyn B. Nathanson, Additive number theory: the classical bases, Springer, 1996.


LINKS



CROSSREFS



KEYWORD

nonn


AUTHOR



STATUS

approved



