OFFSET
1,4
COMMENTS
See explanation in A023190. - Sean A. Irvine, May 27 2019
LINKS
Martin Raab, Table of n, a(n) for n = 1..1166
Thomas J Engelsma, Permissible Patterns
CROSSREFS
KEYWORD
nonn
AUTHOR
EXTENSIONS
More terms from Thomas J Engelsma web page added by Martin Raab, Oct 31 2021
STATUS
approved