35150

Appears in sequences

• a(n) = n*(n+1)*(2*n+1)/3.at n=37A006331
• Admirable numbers n such that the subtracted divisor is > sqrt(n).at n=40A109321
• Number of {2,3}-regular graphs; i.e., labeled simple graphs (no multi-edges or loops) on n vertices, each of degree 2 or 3.at n=7A110040
• a(n) = a(n-1) + a(n-2) + a(n-3) + a(n-4) - a(n-5) with a(0)=0, a(1)=1, a(2)=2, a(3)=3 and a(4)=4.at n=18A135432
• Partial sums of A051941.at n=23A136105
• Number of n X n symmetric binary matrices with all row sums 4.at n=3A139670
• Number of 7X7 arrays of squares of integers, symmetric about main diagonal, with all rows summing to n.at n=3A156391
• T(n,k)=Number of (n*k)Xk binary arrays with nonzero rows in decreasing order, no more than 2 ones in any row and exactly n ones in every column.at n=38A188448
• T(n,k)=Number of (n*k)Xk binary arrays with nonzero rows in decreasing order, no more than 2 ones in any row and exactly n ones in every column.at n=48A188448
• Molecular topological indices of the sunlet graphs.at n=24A192846
• Number of n X n 0..1 symmetric arrays with every row summing to floor(n/2).at n=7A213793
• T(n,k)=Number of n X n 0..k symmetric arrays with every row summing to floor(n*k/2).at n=27A213800
• Number of 7 X 7 0..n symmetric arrays with all rows summing to floor(n*7/2).at n=1A213805
• Triangle read by rows: T(n,k) is the number of n X n symmetric binary matrices with k ones in every row and column.at n=31A333157
• Triangle read by rows: T(n,k) is the number of n X n symmetric binary matrices with k ones in every row and column.at n=32A333157