Multiples of 14.

Terms

a(0) =0a(1) =14a(2) =28a(3) =42a(4) =56a(5) =70a(6) =84a(7) =98a(8) =112a(9) =126a(10) =140a(11) =154a(12) =168a(13) =182a(14) =196a(15) =210a(16) =224a(17) =238a(18) =252a(19) =266a(20) =280a(21) =294a(22) =308a(23) =322a(24) =336a(25) =350a(26) =364a(27) =378a(28) =392a(29) =406