Multiples of 12.

Terms

a(0) =0a(1) =12a(2) =24a(3) =36a(4) =48a(5) =60a(6) =72a(7) =84a(8) =96a(9) =108a(10) =120a(11) =132a(12) =144a(13) =156a(14) =168a(15) =180a(16) =192a(17) =204a(18) =216a(19) =228a(20) =240a(21) =252a(22) =264a(23) =276a(24) =288a(25) =300a(26) =312a(27) =324a(28) =336a(29) =348