257566domain: NAppears in sequencesThe number of sum indecomposable permutations which avoid the patterns 3124 and 4312.at n=10A228770Number of (n+2)X(5+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00001111.at n=9A260367