a(n) is the first occurrence of a composite number whose factorization without exponents contains exactly n circular loops (i.e., loops in digits 0, 6, 8, 9) on each side of the equals sign.
A329542
a(n) is the first occurrence of a composite number whose factorization without exponents contains exactly n circular loops (i.e., loops in digits 0, 6, 8, 9) on each side of the equals sign.
Terms
- a(0) =76a(1) =166a(2) =801a(3) =8067a(4) =38804a(5) =88181a(6) =586668a(7) =3680818a(8) =6899086a(9) =40888802a(10) =168888169a(11) =868862887a(12) =884888909a(13) =4088888618a(14) =6898889086a(15) =40888888618a(16) =108088888891a(17) =864888888892
External references
- oeis: A329542