22828

Appears in sequences

• a(n) = 23 + floor( 1 + Sum_{j=1..n-1} a(j)/2 ).at n=17A120147
• The hyper-Wiener index of the straight pentachain of n pentagonal rings (see Fig. 2.1 in the A. A. Ali et al. reference).at n=11A224460
• Number of (4+1) X (n+1) 0..1 arrays with every 2 X 2 subblock ne-sw antidiagonal difference nondecreasing horizontally and nw+se diagonal sum nondecreasing vertically.at n=18A258557
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 405", based on the 5-celled von Neumann neighborhood.at n=31A271814
• Numbers n such that Bernoulli number B_{n} has denominator 1590.at n=34A272140
• Numbers with digits 2 and 8 only.at n=35A284922
• Composite numbers k such that phi(k) * psi(k) + 1 is a perfect square, where phi is the Euler totient function (A000010) and psi is the Dedekind psi function (A001615).at n=34A309653
• Number of partitions of n with up to three distinct kinds of 1.at n=37A320690
• a(n) = Sum_{k=0..floor((n-1)/5)} Stirling2(n,5*k+1).at n=10A365529