A171166
A polyspiral path: a(n) represents the n-th vertex of a lattice path with an infinite number of finite square spirals.
Original entry on oeis.org
0, 2, 4, 5, 6, 11, 16, 19, 22, 24, 26, 27, 28, 36, 44, 49, 54, 58, 62, 65, 68, 70, 72, 73, 74, 85, 96, 103, 110, 116, 122, 127, 132, 136, 140, 143, 146, 148, 150, 151, 152, 166, 180, 189, 198, 206, 214, 221, 228, 234, 240, 245, 250, 254, 258
Offset: 0
A210604
Bisection of Recamán's sequence A005132.
Original entry on oeis.org
0, 3, 2, 13, 12, 11, 10, 9, 8, 43, 42, 41, 42, 43, 44, 45, 46, 113, 114, 39, 38, 37, 36, 35, 34, 33, 32, 31, 30, 29, 28, 27, 26, 157, 156, 155, 154, 153, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 367, 368, 369, 370, 151, 152
Offset: 1
1) Written as an irregular array in which each row lists consecutive numbers in ascending order or in descending order:
0;
3,2;
13,12,11,10,9,8;
43,42,41;
42,43,44,45,46;
113,114;
39,38,37,36,35,34,33,32,31,30,29,28,27,26;
...
2) Written as an irregular array in which each row lists consecutive numbers in ascending order, in descending order or in descending-ascending order:
0;
3,2;
13,12,11,10,9,8;
43,42,41,42,43,44,45,46;
113,114;
39,38,37,36,35,34,33,32,31,30,29,28,27,26;
...
A210605
Bisection of Recamán's sequence A005132.
Original entry on oeis.org
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
Offset: 1
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 descending-ascending 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;
...
A210608
Number of intersections after n-th stage in the structure mentioned in A210606 using semicircumferences and counting the superposed intersections several times.
Original entry on oeis.org
0, 0, 0, 1, 1, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 6, 6, 7, 7, 8, 14, 22, 28, 36, 43
Offset: 1
A210609
Number of intersections after n-th stage in the structure mentioned in A210606 using semicircumferences and counting the superposed intersections only once.
Original entry on oeis.org
0, 0, 0, 1, 1, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 6, 6, 7, 7, 8, 14, 21, 27
Offset: 1
Cf.
A005132,
A064289,
A119632,
A160356,
A160357,
A171175,
A171178,
A210606,
A210607,
A210608,
A210610-
A210613.
A210610
Number of semicircumferences in the n-th spiral of the structure mentioned in A210606.
Original entry on oeis.org
3, 11, 4, 10, 4, 28, 10, 24, 8, 2, 4, 9, 4, 2, 36, 12, 4, 2, 3, 28, 10, 52, 18, 32, 12, 15, 38, 14, 32, 12, 44, 16, 148, 50, 7, 22, 8, 3, 4, 2, 70, 24, 114, 42, 200, 68, 6, 2, 13
Offset: 1
Comments