28783

Appears in sequences

• Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 23 ones.at n=21A031791
• Brilliant numbers (A078972) whose digit reversal is the product of 2 palindromes greater than 1.at n=32A115681
• Number of distinct solutions of sum{i=1..5}(x(2i-1)*x(2i)) = 0 (mod n), with x() in 0..n-1.at n=6A180797
• T(n,k)=number of distinct solutions to sum{i=1..k}(x(2i-1)*x(2i)) == 0 (mod n), with x() in 0..n-1.at n=61A180803
• Number of (n+6)X10 0..1 matrices with each 7X7 subblock idempotent.at n=4A224584
• Number of (n+6)X11 0..1 matrices with each 7X7 subblock idempotent.at n=3A224585
• T(n,k)=Number of (n+6)X(k+6) 0..1 matrices with each 7X7 subblock idempotent.at n=31A224588
• Number of partitions of n such that (number parts having multiplicity 1) is not a part and (number of 1s) is a part.at n=50A241507
• Irregular triangle T(n,m), numerators of coefficients in a power/Fourier series expansion of the plane pendulum's exact time dependence.at n=13A274130
• a(n) = Sum_{k=0..floor(n/3)} binomial(2*n-k+1,n-3*k).at n=8A371773