a(n) is the index of the smallest n-gonal pyramidal number with exactly n distinct prime factors.
A359015
a(n) is the index of the smallest n-gonal pyramidal number with exactly n distinct prime factors.
Terms
- a(0) =7a(1) =17a(2) =84a(3) =115a(4) =220a(5) =468a(6) =3058a(7) =5719a(8) =18290a(9) =182104a(10) =144738a(11) =1984619a(12) =12051935a(13) =41133455a(14) =79156454
External references
- oeis: A359015