20966400

Appears in sequences

• E.g.f.: x/(1-x)+log((1-x)/(1-2*x)).at n=9A052850
• Trajectory of 318 under the Reverse and Add! operation carried out in base 4, written in base 10.at n=20A075153
• Number of permutations of 1..n with all adjacent differences <= 8 in absolute value.at n=11A177280
• Number of parity alternating permutations of [n] avoiding descents from odd to even numbers.at n=18A199660
• El Gradechi's hybrid coefficients alpha^{4,4}_{2n}.at n=31A331768