22841

Appears in sequences

• Numbers k such that 101*2^k+1 is prime.at n=29A032400
• a(n) = (n+1) * A005493(n).at n=6A127741
• Collatz (or 3x+1) trajectory starting at 703.at n=26A161021
• Number of tatami tilings of a 2 X n grid (with monomers allowed).at n=12A180965
• a(n) = Sum_{d|n} d * sigma(n/d, d).at n=21A198302
• Number of lattice points in the closed region bounded by the graphs of y = (5/6)*x^2, x = n, and y = 0, excluding points on the x-axis.at n=42A227347
• Triangle read by rows, T(n, k) = 2^k*binomial(n, k)*hypergeom([-k, k - n, k - n], [1, -n], 1/2) for n >= 0 and 0 <= k <= n.at n=49A299444
• Numbers that cannot be expressed as the sum of one or more numbers without any repeated digits.at n=31A342080
• Number of solutions to 1 +-* 2 +-* 3 +-* ... +-* n = 0.at n=16A342602
• Number of integer partitions of n with fewer parts than distinct divisors of parts.at n=52A371173
• Number of powerful numbers that are not powers of primes (i.e. are in A286708) that do not exceed 2^n.at n=27A380431