25394

Appears in sequences

• Number of series-reduced dyslexic planted planar trees with n leaves of 2 colors where any 2 subtrees extending from the same node are different.at n=9A032068
• G.f.: 1 / Product_{k>=1} (1-x^k)^(k-1).at n=23A052847
• The smallest magic constant for n X n magic square with prime entries (regarding 1 as a prime).at n=17A073502
• The number of 1-length gaps in all possible covers of n-length line by 2-length segments.at n=31A228577
• Numbers k such that 7*R_(k+2) - 5*10^k is prime, where R_k = 11...1 is the repunit (A002275) of length k.at n=16A257028
• 1/(Integral_{x=0..1} x^(x^(x^n)) dx - 1/2), rounded to the nearest integer.at n=35A322009
• a(n) = Sum_{k=0..n} (k+1) * binomial(k,2*(n-k)).at n=15A391962