644972544

Appears in sequences

• Number of (n+2)X(n+2) symmetric binary matrices without the pattern 0 1 1 antidiagonally.at n=5A190532
• a(n) = A253560(A253883(n)) = A122111((2*A122111(n)) - 1).at n=28A253890
• Number of permutations p of [n] such that p(i)-i is a multiple of nine for all i in [n].at n=30A275064
• Superior 2-highly composite numbers: 3-smooth numbers (A003586) k for which there is a real number e > 0 such that d(k)/k^e >= d(j)/j^e for all 3-smooth numbers j, where d(k) is the number of divisors of k (A000005).at n=24A309016
• Powers k^m, m > 1, where k is an Achilles number that is a product of primorials.at n=21A389260
• Powers k^m, m > 2, where k is an Achilles number.at n=12A390436