OFFSET
1,2
LINKS
Andrew Howroyd, Table of n, a(n) for n = 1..200
FORMULA
a(n) = Sum_{d|n} A316674(n/d, d).
EXAMPLE
The a(2) = 5 matrices are:
[1] [1 0] [0 1] [2] [1 1]
[1] [0 1] [1 0]
CROSSREFS
KEYWORD
nonn
AUTHOR
Andrew Howroyd, Jan 23 2020
STATUS
approved