Positive integers k such that sopfr(k) divides sopfr(k+1), where sopfr(k) is the sum of the prime factors of k, counting multiplicity.

A129316

Positive integers k such that sopfr(k) divides sopfr(k+1), where sopfr(k) is the sum of the prime factors of k, counting multiplicity.

Terms

    a(0) =5a(1) =8a(2) =15a(3) =77a(4) =125a(5) =160a(6) =252a(7) =496a(8) =714a(9) =948a(10) =980a(11) =1045a(12) =1053a(13) =1260a(14) =1330a(15) =1378a(16) =1404a(17) =1430a(18) =1508a(19) =1520a(20) =1610a(21) =1750a(22) =1862a(23) =1890a(24) =2170a(25) =2491a(26) =2680a(27) =2821a(28) =3094a(29) =3100

External references