18567

Appears in sequences

• a(n) = sum of the first n upper twin primes.at n=40A086168
• Consider the family of multigraphs enriched by the species of involutions. Sequence gives number of those multigraphs with n loops and edges.at n=5A099697
• 1/16 the number of (n+1) X 3 binary arrays with no 2 X 2 subblock being a reflection across the shared element pair of any horizontal or vertical neighbor.at n=6A183804
• 1/16 the number of (n+1)X8 binary arrays with no 2X2 subblock being a reflection across the shared element pair of any horizontal or vertical neighbor.at n=1A183809
• T(n,k)=1/16 the number of (n+1)X(k+1) binary arrays with no 2X2 subblock being a reflection across the shared element pair of any horizontal or vertical neighbor.at n=29A183811
• T(n,k)=1/16 the number of (n+1)X(k+1) binary arrays with no 2X2 subblock being a reflection across the shared element pair of any horizontal or vertical neighbor.at n=34A183811
• Number of squares of all sizes in 3*n*(n+1)/2-ominoes in form of three-quarters of Aztec diamonds.at n=35A258440
• Positive integers m such that m, m + 1 and m + 2 are a sum of a positive square and a positive cube.at n=42A295787
• a(n) = Sum_{k=1..n} k * A088370(n,k).at n=41A309371