44051

Appears in sequences

• Coefficient of x^4 in (1-x-x^2)^(-n).at n=27A006504
• a(n) = (10*n+3)*(10*n+17).at n=20A152579
• Numbers n such that d(n + d(n)) = d(n), where d(n) is the sum of the distinct primes dividing n.at n=39A175760
• a(n) = 7*binomial(5*n+7, n)/(5*n+7).at n=5A233669
• Number T(n,k) of isoscent sequences of length n with exactly k descents; triangle T(n,k), n>=0, 0<=k<=n+2-ceiling(2*sqrt(n+1)), read by rows.at n=37A242352
• Number of isoscent sequences of length n with exactly four descents.at n=3A243477
• G.f. satisfies A(x) = (1 + x*A(x)*(1 + x*A(x)))^5.at n=5A376328