258304

Appears in sequences

• Arises in enumerating Huffman codes, compact trees, and sums of unit fractions.at n=20A194631
• Number of 3 X n arrays of the minimum value of corresponding elements and their horizontal, vertical or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..2 3 X n array.at n=16A219687
• Number of subsets of {1..n-1} that can be linearly combined using nonnegative coefficients to obtain n.at n=18A365542