

A210605


Bisection of Recamán's sequence A005132.


2



1, 6, 7, 20, 21, 22, 23, 24, 25, 62, 63, 18, 17, 16, 15, 14, 79, 78, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 224, 225, 226, 227, 228, 75, 74, 73, 72, 71, 70, 69, 68, 67, 66, 65, 64, 265, 264, 263, 262, 261, 40, 265, 494, 495, 258, 259
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OFFSET

1,2


COMMENTS

Also length of the vertical edges of a rectangular polyspiral path. For the horizontal edges see A210604. The mentioned polyspiral path is one of the three views of a rectangular polyhelix which is a threedimensional graphical representation of Recamán's sequence A005132.


LINKS

Table of n, a(n) for n=1..61.
Index entries for sequences related to Recamán's sequence


EXAMPLE

1) Written as an irregular array in which each row lists consecutive numbers in ascending order or in descending order:
1;
6,7;
20,21,22,23,24,25;
62,63;
18,17,16,15,14;
79,78,77;
78,79,80,81,82,83,84,85,86,87,88,89,90,91;
...
2) Written as an irregular array in which each row lists consecutive numbers in ascending order, in descending order or in descendingascending order:
1;
6,7;
20,21,22,23,24,25;
62,63;
18,17,16,15,14;
79,78,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91;
...


CROSSREFS

Cf. A005132, A065056, A171175, A171178, A210604A210607.
Sequence in context: A285819 A287760 A305675 * A175262 A081348 A002361
Adjacent sequences: A210602 A210603 A210604 * A210606 A210607 A210608


KEYWORD

nonn,tabf


AUTHOR

Omar E. Pol, Mar 23 2012


STATUS

approved



