OFFSET
1,2
COMMENTS
Number of distinct nonsquare m X n matrices such that m and n are divisors of n.
LINKS
Harvey P. Dale, Table of n, a(n) for n = 1..1000
MATHEMATICA
Table[DivisorSigma[0, n]^2 - DivisorSigma[0, n], {n, 100}]
#(#-1)&/@DivisorSigma[0, Range[100]] (* Harvey P. Dale, Nov 03 2022 *)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Wesley Ivan Hurt, Aug 30 2020
STATUS
approved