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

0,1

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

Table of n, a(n) for n=0..92.

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

Crossrefs

Sequence in context: A021682 A242187 A094692 * A329740 A110669 A106027

Adjacent sequences: A059136 A059137 A059138 * A059140 A059141 A059142

Keyword

easy,nonn

Author

Jonas Wallgren, Jan 19 2001

Status

approved