56550

Appears in sequences

• a(n) = a(n-1) + a(n-1-(number of odd terms so far)).at n=43A007604
• a(n) = Sum{T(i,j)}, 0<=j<=i, 0<=i<=2n, T given by A026568.at n=11A026583
• Partial sums of A054595.at n=5A177451
• Number of ways to place a non-attacking black king and white king on an n X n board, up to rotation and reflection.at n=26A357723