a(n) = 11n + 1.

Terms

a(0) =1a(1) =12a(2) =23a(3) =34a(4) =45a(5) =56a(6) =67a(7) =78a(8) =89a(9) =100a(10) =111a(11) =122a(12) =133a(13) =144a(14) =155a(15) =166a(16) =177a(17) =188a(18) =199a(19) =210a(20) =221a(21) =232a(22) =243a(23) =254a(24) =265a(25) =276a(26) =287a(27) =298a(28) =309a(29) =320