OFFSET
0,2
LINKS
Rémy Sigrist, PARI program for A331349
EXAMPLE
The first values can be found alongside this spiral:
1---2---1---1---2---1---1
| |
1 2---1---1---2---+ 2
| | | |
2 1 1---1---2 2 1
| | | | | |
2 | 2 1---2 | 2
| | | | |
1 1 1---2---2---1 2
| | |
1 2---2-------1-------1
|
2---1---1---2---1---1---2 ...
PROG
(PARI) See Links section.
CROSSREFS
KEYWORD
nonn
AUTHOR
Rémy Sigrist, Jan 14 2020
STATUS
approved