2086817domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes of the form 7n^2 + 5.at n=24A201606Equals two maps: number of 2 X n binary arrays indicating the locations of corresponding elements equal to exactly two of their horizontal, diagonal and antidiagonal neighbors in a random 0..1 2 X n array.at n=18A220407Prime numbersat n=154906