OFFSET
1,1
COMMENTS
Terms are nonzero if and only if 4*n+1 is a term of A057653.
LINKS
Jörg Arndt, Julia Handl, Plane-filling Folding Curves on the Square Grid, Proceedings of Bridges 2018: Mathematics, Art, Music, Architecture, Education, Culture; Stockholm (2018).
CROSSREFS
KEYWORD
nonn,hard,more
AUTHOR
Joerg Arndt, Dec 06 2017
STATUS
approved