40396

Appears in sequences

• Sum of 10 positive 9th powers.at n=23A003399
• Insert a dot after the first digit of a(n); this is now the beginning of the arithmetic mean of the digits used so far in the sequence. Lexicographically earliest sequence of distinct positive terms with this property.at n=33A335744
• Let PG(n) be the graph with one node for each free n-celled polyhex and edges between nodes corresponding to polyhexes that can be obtained from each other by moving one cell, where the intermediate polyform (the set of cells remaining when the cell to be moved is detached) is not required to be a connected polyhex. a(n) is the number of edges in PG(n).at n=7A389967