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A368074
a(n) is the least number k such that the k-th n-gonal number can be written as the difference of two positive n-gonal numbers in exactly n ways.
1
5, 12, 82, 105, 297, 182
OFFSET
3,1
COMMENTS
The corresponding n-gonal numbers are in A368075.
LINKS
Eric Weisstein's World of Mathematics, Polygonal Number
EXAMPLE
a(3) = 5: T(5) = T(6) - T(3) = T(8) - T(6) = T(15) - T(14), where T(k) is the k-th triangular number.
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Ilya Gutkovskiy, Dec 10 2023
STATUS
approved