A274928 -id:A274928 - cp's OEIS frontend

A275877 Numbers on the East-West axis of A274640 in order of appearance.

1, 2, 3, 4, 5, 8, 6, 11, 7, 12, 15, 16, 10, 9, 17, 19, 13, 24, 25, 22, 14, 18, 31, 27, 20, 26, 33, 21, 34, 37, 38, 43, 35, 39, 36, 40, 23, 49, 41, 28, 52, 29, 47, 32, 53, 46, 44, 55, 30, 60, 54, 45, 61, 48, 50, 66, 51, 73, 57, 70, 71, 76, 78, 83, 81, 77, 72, 65

Offset: 1

N. J. A. Sloane, Aug 16 2016

nonn

Conjectured to be a permutation of the natural numbers.

Alois P. Heinz, Table of n, a(n) for n = 1..2000

Cf. A274640.

Alternate terms of A274924 and A274928 (starting with a single 1).

A324480 Consider the numbers on the x-axis in the spiral shown in A274641; a(n) is the distance from n to the origin, or -1 if n never appears on the x-axis.

Original entry on oeis.org

0, 1, 1, 2, 2, 3, 4, 3, 7, 6, 4, 5, 8, 10, 5, 6, 7, 11, 8, 12, 14, 10, 18, 9, 9, 13, 12, 20, 21, 24, 11, 22, 13, 14, 16, 17, 15, 15, 17, 18, 19, 36, 16, 23, 26, 23, 21, 27, 19, 27, 28, 20, 22, 25, 24, 43, 29, 47, 50, 25, 26, 37, 43, 49, 34, 28, 42, 52, 53, 30, 30

Offset: 0

N. J. A. Sloane, Mar 11 2019

nonn

It is conjectured that every nonnegative number appears on the x-axis exactly once.

a(n) is also the distance to the origin from the point n+1 on the x-axis in A274640.

			The portion of the x-axis near 0 is:
... 14   6   5   4   2   0   1   3   7  10  11 ...
and we see that both 1 and 2 are at distance 1 from 0. So a(1) = a(2) = 1.

Rémy Sigrist, Table of n, a(n) for n = 0..4999
Rémy Sigrist, PARI program for A324480

Cf. A274640, A274641.

The positive and negative x-axes are given in A274924 and A274928.

PARI
```
See Links section.
```

More terms from Jinyuan Wang, Feb 27 2020

cp's OEIS Frontend

A275877 Numbers on the East-West axis of A274640 in order of appearance.

Views

Author

Keywords

Comments

Links

Crossrefs

A324480 Consider the numbers on the x-axis in the spiral shown in A274641; a(n) is the distance from n to the origin, or -1 if n never appears on the x-axis.

Views

Author

Keywords

Comments

Examples

Links

Crossrefs

Programs

PARI

Extensions