Odd numbers of the form p^(1+4k) * r^2, where p is prime of the form 1+4m, r > 1, and gcd(p,r) = 1 that are closer to being perfect than previous terms.
A228059
Odd numbers of the form p^(1+4k) * r^2, where p is prime of the form 1+4m, r > 1, and gcd(p,r) = 1 that are closer to being perfect than previous terms.
Terms
- a(0) =45a(1) =405a(2) =2205a(3) =26325a(4) =236925a(5) =1380825a(6) =1660725a(7) =35698725a(8) =3138290325a(9) =29891138805a(10) =73846750725a(11) =194401220013a(12) =194509436121a(13) =194581580193a(14) =194689796301a(15) =194798012409a(16) =194906228517a(17) =194942300553a(18) =195230876841a(19) =195339092949a(20) =195447309057a(21) =195699813309
External references
- oeis: A228059