45150

Appears in sequences

• Doubly triangular numbers: a(n) = n*(n+1)*(n^2+n+2)/8.at n=24A002817
• Numbers k such that Sum_{d|k} sigma(d)/d is an integer.at n=7A068986
• Triangular numbers which are 6-almost primes.at n=27A076580
• Partial sums of dodecahedral numbers (A006566).at n=14A116689
• Number of (n+2) X 4 binary arrays with consecutive windows of three bits considered as a binary number nondecreasing in every row and column.at n=13A202455
• Number of all possible tetrahedra of any size, having reverse orientation to the original regular tetrahedron, formed when intersecting the latter by planes parallel to its sides and dividing its edges into n equal parts.at n=41A216172
• Number of (n+1)X(2+1) 0..3 arrays with nondecreasing min(x(i,j),x(i,j-1)) in the i direction and nondecreasing absolute value of x(i,j)-x(i-1,j) in the j direction.at n=2A251031
• T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with nondecreasing min(x(i,j),x(i,j-1)) in the i direction and nondecreasing absolute value of x(i,j)-x(i-1,j) in the j direction.at n=8A251037
• Number of (3+1)X(n+1) 0..3 arrays with nondecreasing min(x(i,j),x(i,j-1)) in the i direction and nondecreasing absolute value of x(i,j)-x(i-1,j) in the j direction.at n=1A251040
• Triangular numbers n such that each decimal digit of n is equal to the difference of at least two other digits of n.at n=10A255917
• a(n) = 3*(9*n - 1)*(3*n - 2).at n=24A277985
• Unitary practical numbers that are nonsquarefree.at n=34A287173
• Triangular numbers that in base 2 have the same number of 0's and 1's.at n=30A345348
• Number of integer compositions of n with all distinct run-sums.at n=21A353850
• Array read by antidiagonals: T(m,n) is the number of (undirected) cycles in the complete bipartite graph K_{m,n}.at n=59A360849
• Array read by antidiagonals: T(m,n) is the number of (undirected) cycles in the complete bipartite graph K_{m,n}.at n=61A360849
• G.f. A(x) satisfies A(x) = (1 + x*A(x)^3) * (1 + x*A(x))^3.at n=5A379190