OFFSET
1,2
COMMENTS
Partial sums of number of inequivalent Latin squares (or isotopy classes of Latin squares) of order n. The subsequence of primes (6 in a row) in this partial sum begins: 2, 3, 5, 7, 29, 593.
FORMULA
a(n) = SUM[i=1..n] A040082(i).
EXAMPLE
a(7) = 1 + 1 + 1 + 2 + 2 + 22 + 564 = 593 is prime.
CROSSREFS
KEYWORD
nonn
AUTHOR
Jonathan Vos Post, Mar 21 2010
STATUS
approved