35905

Appears in sequences

• a(n) = n^3 - n + 1.at n=33A061600
• The last number for which a determinant of base-n numbers is nonzero.at n=31A079505
• Expansion of (1 - x)/(1 - 2*x + 3*x^2) in powers of x.at n=21A087455
• Triangle read by rows: T(n,k) = number of Schroeder paths of length 2n and having k ascents.at n=57A090981
• Numbers k such that sigma(phi(k))-phi(sigma(k)) is nonzero and is divisible by (k-1), that is A065395(k)/(k-1) = (phi(sigma(k))-sigma(phi(k)))/(k-1) is a nonzero integer.at n=10A092585
• Numbers k = p*q*r (p, q, r prime) congruent to 0 mod p+q+r.at n=32A160394
• Antidiagonal sums of the convolution array A213747.at n=8A213749
• Number of distinct n-digit patterns in base 10 such that the pattern and its reverse are prime.at n=6A256623
• Odd squarefree composite numbers k, divisible by the sum of their prime factors, sopfr (A001414).at n=24A308643
• a(n) is the largest integer x such that x/sopf(x) = prime(n) where sopf(x) is the sum of distinct prime factors of x and prime(n) is the n-th prime.at n=38A336493
• a(1) = 1; a(n) = a(n-1) + 2 * a(floor(n/2)).at n=44A347027