23034

Appears in sequences

• Cluster series for site percolation problem on honeycomb matching lattice (honeycomb structure with 1st, 2nd and 3rd neighbors connected).at n=6A003200
• Number of positive words of length n in the monoid Br_7 of positive braids on 8 strands.at n=7A097554
• Numbers k such that 10^(2*k+1) - 10^k - 1 is prime.at n=5A183187
• k such that 10^(2*k+1)-j*10^k-1 is prime for some j = 1, 2, 4, 5, 7 or 8.at n=37A213881
• Number of (n+1)X(2+1) 0..2 arrays with every element next to itself plus and minus one within the range 0..2 horizontally or antidiagonally, with no adjacent elements equal.at n=6A232583
• T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with every element next to itself plus and minus one within the range 0..2 horizontally or antidiagonally, with no adjacent elements equal.at n=34A232589
• Number of (7+1)X(n+1) 0..2 arrays with every element next to itself plus and minus one within the range 0..2 horizontally or antidiagonally, with no adjacent elements equal.at n=1A232596
• Expansion of Product_{k>=1} ((1 + k*x^k) / (1 - x^k)).at n=16A267004
• Sum of antidiagonals of triangle of 3-Stirling numbers of the first kind.at n=9A295226
• Numbers k such that Bernoulli number B_{k} has denominator 64722.at n=17A295592
• Number of vertices in a polygon whose boundary consists of n+2 equally spaced points around a semicircle and n+2 equally spaced points along the diameter (a total of 2n+2 points). See Comments for precise definition.at n=15A334458
• Number of integer partitions of the n-th squarefree semiprime into squarefree semiprimes.at n=52A338903