221581

Properties

Appears in sequences

• Number of n X n binary arrays with rows and columns, considered as graycode numbers, in nondecreasing order, and an odd number of ones in each row or column.at n=6A162077
• Number of n X 3 binary arrays with row sums nondecreasing and columns lexicographically nondecreasing.at n=9A267240
• Prime numbersat n=19742