29020

Appears in sequences

• Numbers k such that 27*2^k-1 is prime.at n=37A050539
• Third extended Jacobsthal recurrence: a(n)=4a(n-1)-6(n-2)+4a(n-3)-a(n-4)+2a(n-5).at n=18A134987
• a(n) = 1000*n + 20.at n=28A157510
• Number of ways to place 6 nonattacking amazons (superqueens) on a 6 X n board.at n=13A174645
• Half the number of (n+2)X(n+2) binary arrays with each 3X3 subblock having a sum in 2..7.at n=1A186787
• Half the number of (n+2)X4 binary arrays with each 3X3 subblock having a sum in 2..7.at n=1A186789
• T(n,k)=Half the number of (n+2)X(k+2) binary arrays with each 3X3 subblock having a sum in 2..7.at n=4A186796
• Triangle of coefficients of polynomials v(n,x) jointly generated with A209830; see the Formula section.at n=52A209831
• Number of odd parts in the partitions of n into 8 parts.at n=45A309628
• Number of n-node rooted trees in which six equals the maximal number of nodes in paths starting at a leaf and ending at the first branching node or at the root.at n=11A318902
• a(n) = 1*2*3 - 4*5*6 + 7*8*9 - 10*11*12 + 13*14*15 - ... + (up to n).at n=40A319543