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A059139 A hierarchical sequence (W2{2}*c - see A059126). 0
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 (list; graph; refs; listen; history; text; internal format)
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 * A110669 A106027 A101159

Adjacent sequences:  A059136 A059137 A059138 * A059140 A059141 A059142

KEYWORD

easy,nonn

AUTHOR

Jonas Wallgren, Jan 19 2001

STATUS

approved

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Last modified October 21 01:47 EDT 2018. Contains 316405 sequences. (Running on oeis4.)