21898

Appears in sequences

• Numbers k such that the continued fraction for sqrt(k) has period 91.at n=15A020430
• Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 17.at n=8A031605
• Triangle read by rows: T(n,k) is the number of strongly connected directed multigraphs with loops, with n arcs and k vertices.at n=48A139622
• A linear combination of Eulerian numbers (A008292) and Pascal's triangle (A007318); t(n,m)=(3*A008292(n,m)-A007318(n,m))/2.at n=38A141691
• A linear combination of Eulerian numbers (A008292) and Pascal's triangle (A007318); t(n,m)=(3*A008292(n,m)-A007318(n,m))/2.at n=42A141691
• Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically, diagonally or antidiagonally exactly three ways, and new values 0..1 introduced in row major order.at n=17A204746
• Sigma(n)-n values in A085844.at n=28A216383
• Number of partitions of n having no perfect cube parts (n>=0).at n=50A264393
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 798", based on the 5-celled von Neumann neighborhood.at n=33A273571
• T(n, k) = Sum_{j=k..n} binomial(n, j)*E2(j, j-k), where E2 are the Eulerian numbers A201637. Triangle read by rows, T(n, k) for 0 <= k <= n.at n=42A343804
• Numbers k such that A234575(k,s) = s^2 where s = A007953(k).at n=36A358034
• Consecutive states of the linear congruential pseudo-random number generator (625*s + 6571) mod 31104 when started at s=1.at n=27A385279