OFFSET
0,5
COMMENTS
Number of subsets of [n] having a distset (set of distances, see definition in A349976) of cardinality 4.
LINKS
Index entries for linear recurrences with constant coefficients, signature (2,0,-1,-1,0,2,-1).
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Peter Luschny, Dec 10 2021
STATUS
approved