OFFSET

0,3

COMMENTS

Related to, but not the same as the case with the circle centered at the corner of a cell, see A232499.

LINKS

Rok Cestnik, Visualization

PROG

(Python)

N = 12

from math import sqrt

# the distance to the edge of each cell

edges = [[-1 for j in range(N)] for i in range(N)]

edges[0][0] = 0

for i in range(1, N):

edges[i][0] = i-0.5

edges[0][i] = i-0.5

for i in range(1, N):

for j in range(1, N):

edges[i][j] = sqrt((i-0.5)**2+(j-0.5)**2)

# the values of the distances

values = []

for i in range(N):

for j in range(N):

values.append(edges[i][j])

values = list(set(values))

values.sort()

# the cell order

board = [[-1 for j in range(N)] for i in range(N)]

count = 0

for v in values:

for i in range(N):

for j in range(N):

if(edges[i][j] == v):

board[i][j] = count

count += 1

# print out the sequence

for i in range(N):

print(str(board[i][0])+" ", end="")

CROSSREFS

KEYWORD

nonn

AUTHOR

Rok Cestnik, Jan 20 2019

STATUS

approved