238021

Appears in sequences

• G.f.: Sum_{n>=0} (2*n+1)! * x^n / Product_{k=1..2*n+1} (1 + k*x).at n=4A208886
• Numbers x such that x = Sum_{i=1..k} (x mod d_(x-i)) + Sum_{i=1..k} (x mod d_(x+i)) for some k, where d_(x-i) and d_(x+i) are the aliquot parts of (x-i) and (x+i).at n=15A286873
• Number of permutations p of [n] whose fixed points j < n have a larger right neighbor p(j+1) > j.at n=9A371800