116886

Appears in sequences

• 1 / min{1/n - 1/a - 1/b > 0}, where a and b are integers.at n=20A045470
• a(n) = n^2 * (n^2 - 1)/2.at n=21A083374
• Triangular numbers that are the product of 2 palindromes greater than 1.at n=40A115744
• Triangular numbers composed of digits {1,6,8}.at n=5A119142
• a(n) = (n-1)*n*(n+1)*(n+2)*(2n+11)/120.at n=21A130857
• Alexandrian integers: numbers of the form n = p*q*r such that 1/n = 1/p - 1/q - 1/r for some integers p,q,r.at n=41A147811
• Row sums of the triangle A045975.at n=21A204558
• Triangular numbers that are the product of a triangular number and an oblong number.at n=27A253652
• The first of three consecutive hexagonal numbers the sum of which is equal to the sum of three consecutive primes.at n=12A298272
• Numbers that are product of a hexagonal number (A000384) and a square pyramidal numbers (A000330) in at least two ways.at n=23A306121
• a(n) is the start of the first run of exactly n consecutive nonsquarefree triangular numbers.at n=6A333756
• a(n) is the total number of down steps between the (n-1)-th and n-th up steps in all 2-Dyck paths of length 3*n. A 2-Dyck path is a nonnegative path with steps (1, 2), (1, -1) that starts and ends at y = 0.at n=8A334976