25909

Appears in sequences

• Strong pseudoprimes to base 41.at n=17A020267
• Numbers k such that the continued fraction for sqrt(k) has period 63.at n=32A020402
• a(n) = Sum_{k=0..n} (k+1) * A026670(n, k).at n=11A026985
• Number of nX2 0..1 arrays with every element equal to 0, 1, 2, 4 or 5 king-move adjacent elements, with upper left element zero.at n=11A298215
• G.f. satisfies A(x) = ( 1 + x / (1 - x*A(x)^2) )^2.at n=8A371612