43200

Appears in sequences

• Theta series of direct sum of 3 copies of hexagonal lattice.at n=35A008654
• Triangle of numbers n!(n-1)!...(n-k+1)!/(1!2!...k!).at n=25A009963
• Triangle of numbers n!(n-1)!...(n-k+1)!/(1!2!...k!).at n=23A009963
• a(n) = n!*(n+1)!/2.at n=4A010796
• a(n) = n! * (n+1)! * (n+2)! * (n+3)! / (2! * 3! * 4!).at n=2A010798
• a(n) is least k such that k and 9k are anagrams in base n (written in base 10).at n=21A023101
• E.g.f. 1/(1-3x-x^2).at n=5A052595
• Number of n X n binary matrices with no 0 rows or columns and with n+1 1's.at n=5A055602
• n written efficiently in natural numbers base, i.e., in form ...wxyz where n =1*z + 2*y + 3*x + 4*w + ... with z < 1, y < 2, x < 3, w < 4, ...at n=36A055992
• Number of square divisors of n!.at n=38A055993
• Write the numbers from 1 to n^2 in a spiraling square; a(n) is the total of the sums of the two diagonals.at n=32A059924
• Shifts left when MASKCONVolved with itself.at n=12A062177
• Triangle T(n,k) generalizing the tangent numbers.at n=14A064190
• Inverse of determinant of n X n matrix whose (i,j)-th element is 1/(i+j).at n=3A067689
• Product of all n - d, where 1 < d < n and d is a divisor of n.at n=19A072512
• a(n) is least k such that A077614(k)=n or 0 if there is none.at n=12A077615
• Triangle of generalized Stirling numbers S_{3,2}(n,k) read by rows (n>=1, 2<=k<=2n).at n=16A078740
• Triangle built from first column sequences of generalized Stirling2 arrays (m+2,2)-Stirling2, m >= 0.at n=16A091543
• Second column (k=3) sequence of array A078740 ((3,2)-Stirling2) divided by 6.at n=3A091549
• A092186(n)/2.at n=9A092187