27554

Appears in sequences

• Number of strong starters in cyclic group of order 2n+1.at n=10A001443
• Number of labeled 3-colorable (i.e., chromatic number <= 3) graphs on n nodes.at n=5A084279
• Numbers k such that digit sum of 3^k is a power of 3.at n=35A118872
• Number of (n+2)X4 binary matrices with every 3X3 block having exactly four 1's.at n=5A181256
• Number of (n+2)X8 binary matrices with every 3X3 block having exactly four 1's.at n=1A181260
• T(n,k) = number of (n+2) X (k+2) binary matrices with every 3 X 3 block having exactly four 1's.at n=22A181262
• T(n,k) = number of (n+2) X (k+2) binary matrices with every 3 X 3 block having exactly four 1's.at n=26A181262
• Number of (n+2)X(2+2) 0..3 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 3 4 5 or 6.at n=1A251831
• T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 3 4 5 or 6.at n=4A251836