59139

Appears in sequences

• Maximal matchings in rooted plane trees on n nodes.at n=9A007860
• Sums of distinct powers of 9.at n=38A033046
• Positive numbers having the same set of digits in base 2 and base 9.at n=33A037414
• Sums of 3 distinct powers of 9.at n=12A038488
• Expansion of (1-x+x^2)/((1-x)(1-x-x^2-x^3)).at n=18A202012
• Total number of inversions in all partitions of n.at n=26A271370
• a(n) = Sum_{k=1..n} (-3)^(floor(n/k) - 1).at n=10A345035