250841

Properties

Appears in sequences

• Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 34.at n=26A031622
• Numbers such that all subsets of {prime(a(1)), ..., prime(a(n))} have a different sum.at n=21A138856
• Number of n X n 0..2 arrays with rows and columns, considered as 3-ary numbers, in nondecreasing order.at n=3A162085
• Number of nX4 0..2 arrays with rows and columns in nondecreasing order.at n=3A184132
• T(n,k)=Number of nXk 0..2 arrays with rows and columns in nondecreasing order.at n=24A184137
• T(n,k)=Number of n X n 0..k arrays with rows and columns in lexicographically nondecreasing order.at n=13A229794
• Number of 4X4 0..n arrays with rows and columns in lexicographically nondecreasing order.at n=1A229797
• Number of (n+1)X(3+1) 0..2 arrays x(i,j) with row sums sum{j^4*x(i,j), j=1..3+1} nondecreasing, and column sums sum{i^4*x(i,j), i=1..n+1} nondecreasing.at n=2A232851
• T(n,k)=Number of (n+1)X(k+1) 0..2 arrays x(i,j) with row sums sum{j^4*x(i,j), j=1..k+1} nondecreasing, and column sums sum{i^4*x(i,j), i=1..n+1} nondecreasing.at n=12A232852
• Number of compositions (ordered partitions) of n into distinct parts where no part is a multiple of 4.at n=45A332310
• Number of nonisomorphic unordered triples of involutions on an n-set.at n=11A362650
• Prime numbersat n=22103