a(n) is the index of the smallest triangular number with exactly n distinct prime factors.
A359017
a(n) is the index of the smallest triangular number with exactly n distinct prime factors.
Terms
- a(0) =1a(1) =2a(2) =3a(3) =11a(4) =20a(5) =84a(6) =455a(7) =1364a(8) =10659a(9) =58695a(10) =254540a(11) =728364a(12) =13516580a(13) =133595384a(14) =812646120a(15) =5327923964a(16) =68971338435a(17) =838101203939
External references
- oeis: A359017