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A131271 Ranks in natural order of 2^n increasing real numbers appearing in limit cycles of interval iterations, or Median Spiral Order. 2
1, 8, 4, 5, 2, 7, 3, 6, 1, 16, 8, 9, 4, 13, 5, 12, 2, 15, 7, 10, 3, 14, 6, 11 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

REFERENCES

J. Demongeot, J. Waku, Some computational aspects of interval iterations and applications in demography and physiology, preprint 2007

J. Demongeot, J. Waku, Counter-examples for the population size growth in demography. Math. Pop. Studies, 12, 199-210 (2005).

LINKS

Table of n, a(n) for n=1..24.

J. Demongeot, J. Waku, Counter-examples for the population size growth in demography, Math. Pop. Studies 12 (2005), 199-210.

FORMULA

a(n, 2k-1) = a(n-1, k), if we order the 2^n first integers a(n, 2k) = 2^n + 1 - a(n, 2k-1)

CROSSREFS

Sequence in context: A153620 A247510 A226581 * A093821 A197256 A195431

Adjacent sequences:  A131268 A131269 A131270 * A131272 A131273 A131274

KEYWORD

fini,nonn

AUTHOR

J. Demongeot (Jacques.Demongeot(AT)imag.fr), Jun 24 2007

STATUS

approved

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Last modified June 28 04:43 EDT 2017. Contains 288813 sequences.