a(n) = 61 written in base 15 - n.

Terms

a(0) =41a(1) =45a(2) =49a(3) =51a(4) =56a(5) =61a(6) =67a(7) =75a(8) =115a(9) =141a(10) =221a(11) =331a(12) =2021a(13) =111101