39951

Appears in sequences

• Numbers k such that abs(prime(k)-k*tau(k)) < sqrt(k).at n=38A068543
• a(n) = direuler(p=2,n,1/(1-X)/(1-p*n*X))[n].at n=33A089745
• a(n) = (10*n+3)*(10*n+17).at n=19A152579
• Number of partitions of n such that the number of even parts is a part and the number of odd parts is not a part.at n=47A240577
• Number of unlabeled multigraphs with loops allowed and n edges covering three vertices.at n=27A327728
• On a diagonally numbered square grid, with labels starting at 1, this is the number of the last cell that a (1,n) leaper reaches before getting trapped when moving to the lowest available unvisited square, or -1 if it never gets trapped.at n=47A352731