1282512domain: NAppears in sequencesINVERT transform of A055615, n*mu(n).at n=24A144028Number of (n+2) X (2+2) 0..3 arrays with every 3 X 3 subblock row and diagonal sum equal to 0 3 5 6 or 7 and every 3 X 3 column and antidiagonal sum not equal to 0 3 5 6 or 7.at n=30A252378