OFFSET
1,2
COMMENTS
In essence the self-convolution of A005189 (omitting the first 2 terms).
LINKS
Poloni, Federico; Del Corso, Gianna M. Counting Fiedler pencils with repetitions. Linear Algebra Appl. 532, 463-499 (2017), corollary 22.
MAPLE
CROSSREFS
KEYWORD
nonn
AUTHOR
R. J. Mathar, Aug 23 2022
STATUS
approved