227240

Appears in sequences

• Sum of the asymmetry degrees of all compositions of n with parts in {1,4}.at n=36A276063
• Number of length n inversion sequences avoiding the patterns 101, 102, 201, and 210.at n=11A279561
• Expansion of e.g.f. Product_{p prime, k>=1} 1/(1 - x^(p^k))^(1/(p^k)).at n=9A318914
• a(n) = Sum_{k=1..n-1} ((-1)^(k+n+1)*binomial(k,floor(k/2))).at n=21A332754