395520domain: NAppears in sequencesRecord gaps between prime quadruplets.at n=30A113404Number of permutations of {1..n} such that every positive integer from 1 to n * (n + 1)/2 is the sum of some circular subsequence.at n=10A325790Number of pairs of antipodal vertices in the level n>1 Sierpiński triangle graph.at n=9A370933