A358321 - OEIS

%I #67 Feb 16 2025 08:34:04

%S 11,210,87,228,1155,7854,66612,395646,2193303,8389010,122574155,

%T 630341910,6066475415

%N a(n) is the index of the smallest n-gonal number with exactly n distinct prime factors.

%H Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/DistinctPrimeFactors.html">Distinct Prime Factors</a>

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

%Y Cf. A358862, A359014.

%K nonn,more

%O 3,1

%A _Ilya Gutkovskiy_, Dec 12 2022