a(n) = either 4a(n-1)+1 or 4a(n-1)+3 depending on corresponding term of A005614, +1 for 0, +3 for 1.

A028894

a(n) = either 4a(n-1)+1 or 4a(n-1)+3 depending on corresponding term of A005614, +1 for 0, +3 for 1.

Terms

    a(0) =1a(1) =5a(2) =23a(3) =95a(4) =381a(5) =1527a(6) =6109a(7) =24439a(8) =97759a(9) =391037a(10) =1564151a(11) =6256607a(12) =25026429a(13) =100105719a(14) =400422877a(15) =1601691511a(16) =6406766047a(17) =25627064189a(18) =102508256759a(19) =410033027037

External references