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a(n) is the index of the smallest n-gonal number divisible by exactly n n-gonal numbers.
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%I #24 Dec 15 2022 13:55:52

%S 3,6,12,48,51,330,1100,702,8120,980,5499,110880,10472,2688,2127411,

%T 517104,710640,396480,2761803,4254120,13347975,707000,3655827

%N a(n) is the index of the smallest n-gonal number divisible by exactly n n-gonal numbers.

%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/PolygonalNumber.html">Polygonal Number</a>

%Y Cf. A358859.

%K nonn,more

%O 3,1

%A _Ilya Gutkovskiy_, Dec 12 2022