a(n) = 5*n + 1.

Terms

a(0) =1a(1) =6a(2) =11a(3) =16a(4) =21a(5) =26a(6) =31a(7) =36a(8) =41a(9) =46a(10) =51a(11) =56a(12) =61a(13) =66a(14) =71a(15) =76a(16) =81a(17) =86a(18) =91a(19) =96a(20) =101a(21) =106a(22) =111a(23) =116a(24) =121a(25) =126a(26) =131a(27) =136a(28) =141a(29) =146