A059139 A hierarchical sequence (W2{2}*c - see A059126).

4, 7, 4, 10, 4, 7, 4, 13, 4, 7, 4, 10, 4, 7, 4, 16, 4, 7, 4, 10, 4, 7, 4, 13, 4, 7, 4, 10, 4, 7, 4, 19, 4, 7, 4, 10, 4, 7, 4, 13, 4, 7, 4, 10, 4, 7, 4, 16, 4, 7, 4, 10, 4, 7, 4, 13, 4, 7, 4, 10, 4, 7, 4, 22, 4, 7, 4, 10, 4, 7, 4, 13, 4, 7, 4, 10, 4, 7, 4, 16, 4, 7, 4, 10, 4, 7, 4, 13, 4, 7, 4, 10, 4

Offset: 0

Author

Jonas Wallgren, Jan 19 2001

Keywords

• easy
• nonn

Comments

Let the general sequence H(a,b,n) = a*A007814(n+1) + b, then this sequence is H(3,4). Other hierarchical sequences of this type are A059132 (H(6,4)), A059141 (H(7,11)), A059144 (H(9,15)), A059134 (H(21,11)), A059137 (H(36,18)).

Links

• Ralf Stephan, Some divide-and-conquer sequences ...
• J. Wallgren, Hierarchical sequences

Formula

a(n) = 4 + 3*A007814(n). a(2n) = 4, a(2n+1) = a(n) + 3. - Ralf Stephan, Oct 09 2003