31449600

Appears in sequences

• Number of n X n symmetric matrices each of whose rows is a permutation of 1..n.at n=7A035482
• Number of (2n+1) X (2n+1) symmetric matrices each of whose rows is a permutation of 1..(2n+1).at n=3A036981
• Sum of unitary divisors of central binomial coefficient C(n, floor(n/2)).at n=26A064140
• Magic products of 6 X 6 multiplicative magic squares.at n=4A113026
• Modified cyclic phone booth sequence: number of ways to occupy n labeled phone booths in a circle one by one, each time picking a phone booth adjacent to the smallest number of previously occupied phone booths.at n=12A192009
• Numbers other than prime powers divisible by the sum, the sum of squares and the sum of cubes of their prime divisors.at n=3A268418
• Number of minimum total dominating sets in the n X n bishop graph.at n=10A321673
• Number of n node tournaments that have exactly two circular triads.at n=6A357242
• Numbers whose divisors have a mean abundancy index that is larger than 3.at n=15A374779
• Number of permutations of [n] having the maximal possible number of pairs of integers i<j in [n] such that their cycle minima have opposite sorting order.at n=24A381531