Final two digits of 2^n.

Terms

a(0) =1a(1) =2a(2) =4a(3) =8a(4) =16a(5) =32a(6) =64a(7) =28a(8) =56a(9) =12a(10) =24a(11) =48a(12) =96a(13) =92a(14) =84a(15) =68a(16) =36a(17) =72a(18) =44a(19) =88a(20) =76a(21) =52a(22) =4a(23) =8a(24) =16a(25) =32a(26) =64a(27) =28a(28) =56a(29) =12