53802

Appears in sequences

• Heptagonal numbers for which the sum of the digits is also a heptagonal number.at n=37A117650
• Maximal number of regions obtained by a straight line drawing of the complete bipartite graph K_{n,n}.at n=21A117717
• Heptagonal numbers A000566 which are the sum of two other heptagonal numbers > 0.at n=19A133251
• Number of nX2 1..3 arrays containing at least one of each value, all equal values connected, and rows considered as a single number in nondecreasing order.at n=21A166776