19209

Appears in sequences

• Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 92.at n=35A031590
• a(n) = (2*n+1)*(12*n+1).at n=28A033576
• Sums of 3 distinct powers of 7.at n=16A038482
• a(n) = 8*7^n+1.at n=4A199485
• Principal diagonal of the convolution array A213778.at n=37A213779
• Number of partitions of n^4 into at most two parts.at n=14A274323
• a(n) is the number of points in the interior of the n-th figure shown in A255011 (meaning the figure with 4n points on the perimeter).at n=7A334690