OFFSET
0,3
LINKS
Rémy Sigrist, Table of n, a(n) for n = 0..10000
Rémy Sigrist, PARI program for A345440
N. J. A. Sloane, Illustration of initial terms [An enlargement of Figure 3 of Wichmann (2019), showing the numbering of the initial cells of the square spiral. The origin is black, the two units +-1 are red, and the primes are blue.]
N. J. A. Sloane, Illustration of initial terms. [The cell numbers are black, their norms are red.]
Brian Wichmann, Tiling for Unique Factorization Domains, Jul 22 2019.
FORMULA
PROG
(PARI) See Links section.
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Jun 25 2021
EXTENSIONS
More terms from Rémy Sigrist, Jun 26 2021
STATUS
approved