22418

Appears in sequences

• Exponential self-convolution of numbers of rooted trees on n nodes.at n=8A006850
• The n-th highly composite number equals the a(n)-th composite number, for n >= 3.at n=23A074329
• a(n) = 1331*n - 209.at n=16A157444
• Number of tilings of a 4 X n rectangle using L tetrominoes and 2 X 2 tiles.at n=11A226322
• Number of (n+1)X(n+1) 0..2 arrays with every 2X2 subblock antidiagonal maximum minus diagonal minimum nondecreasing horizontally and diagonal maximum minus antidiagonal minimum nondecreasing vertically.at n=2A253525
• Number of (n+1)X(3+1) 0..2 arrays with every 2X2 subblock antidiagonal maximum minus diagonal minimum nondecreasing horizontally and diagonal maximum minus antidiagonal minimum nondecreasing vertically.at n=2A253528
• T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with every 2X2 subblock antidiagonal maximum minus diagonal minimum nondecreasing horizontally and diagonal maximum minus antidiagonal minimum nondecreasing vertically.at n=12A253533
• Triangle read by rows, T(n, k) = n! * [y^k] [x^n] exp(1/(1 - x)^(1 + y) - 1), for 0 <= k <= n.at n=23A355267
• Number of maximal subsets of {1..n} containing n such that it is possible to choose a different binary index of each element.at n=30A370641