Highly composite 7-rough numbers: numbers that are not divisible by any prime smaller than 7 and whose number of divisors reaches a record.

A343737

Highly composite 7-rough numbers: numbers that are not divisible by any prime smaller than 7 and whose number of divisors reaches a record.

Terms

    a(0) =1a(1) =7a(2) =49a(3) =77a(4) =539a(5) =1001a(6) =5929a(7) =7007a(8) =17017a(9) =77077a(10) =119119a(11) =323323a(12) =1310309a(13) =2263261a(14) =7436429a(15) =24895871a(16) =52055003a(17) =215656441a(18) =572605033a(19) =1509595087a(20) =6685349671a(21) =16605545957a(22) =46797447697a(23) =215872097441a(24) =247357937827a(25) =514771924667

External references