26853120

Appears in sequences

• Phi(m)*sigma(m), where m is the product of exactly two primes that differ by 2, where phi=A000010, sigma=A000203.at n=7A094949
• Number of permutations of 1..n with no adjacent pair summing to n+7.at n=11A173847
• Number of permutations of 1..n with no adjacent pair summing to n + 8.at n=11A173848
• The number of positive integer sequences of length n with no duplicate substrings of length greater than 1, every number different from its neighbors, and a minimal sum (= A282166(n)).at n=22A284431