51196

Appears in sequences

• Number of connected posets with n elements of height 1.at n=9A007776
• Denominators of continued fraction convergents to sqrt(654).at n=12A042257
• a(n) = (concatenation of numbers from n to 1) - n^n.at n=4A083453
• Number of Catalan knight paths from (0,0) to (n,3) in the region between and on the lines y=0 and y=3. (See A096587 for the definition of Catalan knight.).at n=21A099331
• Number of arrangements of n+2 nonzero numbers x(i) in -3..3 with the sum of x(i)*x(i+1) equal to zero.at n=5A188243
• T(n,k)=Number of arrangements of n+2 nonzero numbers x(i) in -k..k with the sum of x(i)*x(i+1) equal to zero.at n=33A188249
• Number of arrangements of 8 nonzero numbers x(i) in -n..n with the sum of x(i)*x(i+1) equal to zero.at n=2A188254
• Number of (n+1) X (2+1) 0..1 arrays with nondecreasing x(i,j)+x(i,j-1) in the i direction and nondecreasing absolute value of x(i,j)-x(i-1,j) in the j direction.at n=11A250777
• Number of n X 4 binary arrays with rows and columns lexicographically nondecreasing and row and column sums nonincreasing.at n=41A266543
• Number of nX4 0..1 arrays with every element unequal to 1, 2, 4, 5 or 8 king-move adjacent elements, with upper left element zero.at n=9A305448
• Number of connected bipartite graphs on n unlabeled nodes with a distinguished bipartite block.at n=11A318870
• a(n) is the first component x of the distance vector (x,y), x >= y >= 0, between two nodes of an infinite square lattice of one-ohm resistors, such that the resistance R between the two nodes is as close as possible to n ohms, i.e., abs(R - n) is minimized. y is A356202(n).at n=4A356201
• Triangle read by rows: T(n,k) is the number of connected unlabeled tiered posets with n elements and height k.at n=56A361958