145984

Appears in sequences

• Half the number of binary relations on n unlabeled points.at n=4A001173
• Number of unlabeled digraphs with loops (relations) on n nodes and with an even number of arcs.at n=5A055973
• Number of unlabeled digraphs with loops (relations) on n nodes and with an odd number of arcs.at n=5A055974
• Triangle read by rows: T(n,k) is the number of Motzkin paths of length n having k UDH's starting at level 0 (U=(1,1),H=(1,0),D=(1,-1)).at n=52A114581
• Number of returns to the x-axis in all hill-free Schroeder paths of length 2n+4. A Schroeder path of length 2n is a lattice path from (0,0) to (2n,0) consisting of U=(1,1), D=(1,-1) and H=(2,0) steps and never going below the x-axis. A hill is a peak at height 1.at n=7A114693
• Minimal exponents m such that the fractional part of (1024/1000)^m obtains a maximum (when starting with m=1).at n=35A153679
• Numbers k such that the fractional part of (1024/1000)^k is greater than 1-(1/k).at n=13A153680
• Number of binary strings of length n with equal numbers of 00101 and 10100 substrings.at n=18A164248