Numbers k such that sopf(k) = (1/2)*(sopf(k+1) + sopf(k-1)), where sopf(x) = sum of the distinct prime factors of x.

A075846

Numbers k such that sopf(k) = (1/2)*(sopf(k+1) + sopf(k-1)), where sopf(x) = sum of the distinct prime factors of x.

Terms

    a(0) =10a(1) =21a(2) =35a(3) =82a(4) =221a(5) =296a(6) =961a(7) =2665a(8) =12629a(9) =13117a(10) =30317a(11) =54485a(12) =99145a(13) =125750a(14) =132728a(15) =142198a(16) =156379a(17) =185461a(18) =225898a(19) =241057a(20) =265227a(21) =265643a(22) =280918a(23) =281396a(24) =284531a(25) =326698a(26) =379331a(27) =393335a(28) =400685a(29) =437241

External references