x = a(n) is the smallest composite number such that sigma(x+6n) = sigma(x)+6n, where sigma = A000203.

A054904

x = a(n) is the smallest composite number such that sigma(x+6n) = sigma(x)+6n, where sigma = A000203.

Terms

    a(0) =104a(1) =65a(2) =20a(3) =80a(4) =44a(5) =125a(6) =45a(7) =63a(8) =40a(9) =99a(10) =56a(11) =70a(12) =296a(13) =125a(14) =88a(15) =110a(16) =104a(17) =145a(18) =212a(19) =182a(20) =80a(21) =170a(22) =333a(23) =105a(24) =369a(25) =185a(26) =184a(27) =135a(28) =180a(29) =301

External references