19974360domain: NAppears in sequencesNumbers m such that 3*m+1 and 8*m+1 are both squares.at n=8A245031Triangular numbers that are the sum of 2 consecutive terms of A130518.at n=12A247247The area of the n-th convex honeycomb formed by spirals of incrementing strips of hexagons.at n=18A373081