48420

Appears in sequences

• Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 22.at n=19A031700
• The binary encoding (as a rooted planar tree) of each rooted planar binary tree. See A057123 for illustration.at n=13A057122
• Numbers k such that z(k) = j(k), where z(k) = sopf(k - d(k)), j(k) = d(sopf(k) + k), sopf(k) = A008472(k) and d(k) = A000005(k).at n=36A063961
• a(n) = 484*n^2 + 2*n.at n=9A158325
• a(n) = 400*n^2 + 20.at n=11A158601
• a(n) = 121*n^2 + n.at n=19A173267
• Number of positive walks with n steps {-4,-3,-2,-1,0,1,2,3,4} starting at the origin, ending at altitude 2, and staying strictly above the x-axis.at n=7A277921