A131271 Ranks in natural order of 2^n increasing real numbers appearing in limit cycles of interval iterations, or Median Spiral Order.

1, 8, 4, 5, 2, 7, 3, 6, 1, 16, 8, 9, 4, 13, 5, 12, 2, 15, 7, 10, 3, 14, 6, 11

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 A328017

Adjacent sequences: A131268 A131269 A131270 * A131272 A131273 A131274

Keyword

fini,nonn

Author

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

Status

approved