115391

Appears in sequences

• Number of 6-chromatic (i.e., chromatic number equals 6) simple graphs on n nodes.at n=9A076282
• Triangle read by rows: T(n,k) is the number of simple graphs on n unlabeled nodes having chromatic number k, 1 <= k <= n.at n=50A084268
• Structured pentagonal icositetrahedral numbers (vertex structure 13).at n=22A100167
• Triangle read by rows: let a(n,k) = number of graphs on n nodes with chromatic number k; T(n,k) = a(n,n-k), n >= 2, k=0..n-2.at n=40A115597
• Number of n X 4 binary arrays with some element plus some horizontally, vertically, diagonally or antidiagonally adjacent neighbor totalling two no more than once.at n=6A268777
• Number of n X 7 binary arrays with some element plus some horizontally, vertically, diagonally or antidiagonally adjacent neighbor totalling two no more than once.at n=3A268780
• T(n,k) = Number of n X k binary arrays with some element plus some horizontally, vertically, diagonally or antidiagonally adjacent neighbor totalling two no more than once.at n=48A268781