130688
domain: N
Appears in sequences
- Arises in enumerating Huffman codes, compact trees, and sums of unit fractions.at n=19A194633
- Sum of neighbor maps: number of n X 1 binary arrays indicating the locations of corresponding elements equal to the sum mod 3 of their horizontal, vertical and antidiagonal neighbors in a random 0..2 n X 1 array.at n=16A220172
- Indices of records in A389240.at n=20A386819