27603

Appears in sequences

• Decimal representation of the binary number formed by the concatenation of digits which are the same in both the left and right binary concatenations of the integers 1 to n.at n=9A175909
• Sampling n numbers between 1 and a(n)-1, you are guaranteed to always find two subsets whose sums are equal.at n=16A180459
• Sum of the squares of the larger parts of the partitions of 2n into two squarefree parts.at n=32A280322
• Number of ways two dihexes can be placed on an n-th regular hexagonal board.at n=5A372855