70422domain: NAppears in sequencesNumber of squarefree palindromes over {0, 1, 2} of length 2n+1.at n=39A012212a(n) = Sum_{i=1..floor((n+2)/4)} a(2i-1)*a(n-2i+1), with a(1)=a(2)=1 and a(3)=6.at n=14A024953Number of 8X8 arrays of squares of integers, symmetric under 90 degree rotation, with all rows summing to n.at n=30A156397