50561

Appears in sequences

• a(i) is a square mod a(j), i <> j.at n=30A034903
• Numerators of continued fraction convergents to sqrt(395).at n=7A041750
• Third row of Pascal-(1,7,1) array A081582.at n=40A081593
• a(n) = 128*n^2 - 32*n + 1.at n=19A157331
• a(n) = 128*n^2 + 2528*n + 12481.at n=9A157436
• a(n) = 2048*n^2 - 128*n + 1.at n=4A157448
• Number T(n,k) of permutations p of [n] such that k is the maximum of the partial sums of the signed up-down jump sequence of 0,p; triangle T(n,k), n>=0, ceiling((sqrt(1+8*n)-1)/2)<=k<=n, read by rows.at n=31A316292
• Number T(n,k) of permutations p of [n] such that k is the maximum of the partial sums of the signed up-down jump sequence of 0,p; triangle T(n,k), k>=0, k<=n<=k*(k+1)/2, read by columns.at n=30A316293
• a(1) = 2; and for n > 1, a(n) = A341512(n) + A347096(n).at n=71A347097