OFFSET
1,3
COMMENTS
See A328526 for images of the triangular frame.
LINKS
Lars Blomberg, Table of n, a(n) for n = 1..65
CROSSREFS
KEYWORD
nonn
AUTHOR
Scott R. Shannon and N. J. A. Sloane, Mar 05 2020
EXTENSIONS
a(12) and beyond from Lars Blomberg, May 01 2020
STATUS
approved