A157140 A091411(k+3) replicated 2^k times, k= 0, 1, 2, 3, ...

9, 19, 19, 47, 47, 47, 47, 98, 98, 98, 98, 98, 98, 98, 98, 220, 220, 220, 220, 220, 220, 220, 220, 220, 220, 220, 220, 220, 220, 220, 220, 441, 441, 441, 441, 441, 441, 441, 441, 441, 441, 441, 441, 441, 441, 441, 441, 441, 441, 441, 441, 441, 441, 441, 441

Offset

0,1

Comments

Generated from the quadrisection b(n) = 4, 13, 23, 32, 51, 60, 70, 79, 102, 111, 121, 130,... of A156799 as follows:

1) b(n+1)-b(n) = 9, 10, 9, 19, 9, 10, 9, 23, 9, 10, 9, 19,..,

2) b(n+2)-b(n) = 19, 19, 28, 28, 19, 19, 32, 32, 19, 19, 28, 28,...,

3) b(n+4)-b(n) = 47, 47, 47, 47, 51, 51, 51, 51, 47, 47, 47, 47,...,

4) b(n+8)-b(n) = 98, 98, 98, 98, 98, 98, 98, 98, 122, 122, 122, 122, 122, 122, 122, 122, 98, .. .

The sum of neighbors at the first jump of b(n+2^k) is 9+10 = 19 (k=0), 19+28 = 47 (k=1), 47+51 = 98 (k=2), 98+122 = 220 (k=3), and in general A091411(k+3).

Links

Table of n, a(n) for n=0..54.

Crossrefs

Sequence in context: A061750 A107780 A288392 * A244538 A242332 A357773

Adjacent sequences: A157137 A157138 A157139 * A157141 A157142 A157143

Keyword

nonn

Author

Paul Curtz, Feb 24 2009

Status

approved