299250

Appears in sequences

• Numbers k such that sigma(k) = phi(prime(k)-1).at n=24A067651
• The maximal number of partitions of {1..3n} that are invariant under a permutation consisting of n 3-cycles, and which have the same number of nonempty parts.at n=8A294202
• Number of integer compositions of n whose leaders of strictly increasing runs are weakly decreasing.at n=21A374697
• G.f. A(x) = Sum_{n>=0} a(n)*x^n where a(n) = Sum_{k=0..n-1} 2^(n-k-1) * ( ([x^k] A(x)^n) (mod 2^n) ) for n > 0, with a(0) = 1.at n=11A376232