A358321 a(n) is the index of the smallest n-gonal number with exactly n distinct prime factors.

11, 210, 87, 228, 1155, 7854, 66612, 395646, 2193303, 8389010, 122574155, 630341910, 6066475415

Offset: 3

Author

Ilya Gutkovskiy, Dec 12 2022

Keywords

• nonn
• more

Links

• Eric Weisstein's World of Mathematics, Distinct Prime Factors
• Eric Weisstein's World of Mathematics, Polygonal Number

Crossrefs

Cf. A358862, A359014.