27713

Appears in sequences

• A Wallis pair (x,y) satisfies sigma(x^2) = sigma(y^2); sequence gives y's for indecomposable Wallis pairs with x < y (ordered by values of x).at n=39A075769
• Number of n X n (0,1)-matrices with zero permanent.at n=4A088672
• Triangle T(n,k) read by rows, where T(n,k) = number of times the permanent of a real n X n (0,1)-matrix takes the value k, for n >= 0, 0 <= k <= n!.at n=14A089479
• Triangle T(n,k) read by rows, where T(n,k) = number of times the permanent of a real singular n X n (0,1)-matrix takes the value k, for n >= 2, 0 <= k <= n!.at n=10A089481
• G.f. satisfies A^3 = BINOMIAL(A)^2, where A = A090351^2.at n=6A090352
• Nonnegative values x of solutions (x, y) to the Diophantine equation x^2+(x+103)^2 = y^2.at n=10A157119
• Positive integers whose square is the sum of 74 consecutive squares.at n=3A257825
• Numbers k such that (13*10^k - 43)/3 is prime.at n=20A290962
• Triangle read by rows: T(n,k) = number of ways, summed over the free n-ominoes, that an n-omino with an assigned orientation can be maximally (partially) covered by k X 1 tiles.at n=46A308437
• Index where prime(n) appears as a term in A379442.at n=58A379558