55991

Appears in sequences

• a(n) = (H(n) - 1)*lcm{1,...,n}, where H(n) is the n-th harmonic number.at n=10A027457
• Numerator of 1/n + 2/(n-1) + 3/(n-2) + ... + (n-1)/2 + n.at n=9A027612
• Numerator - denominator in n-th harmonic number, 1 + 1/2 + 1/3 + ... + 1/n.at n=10A064169
• Erroneous version of A027612.at n=9A081525
• a(n) = running sum of the first n harmonic numbers, multiplied by the LCM of 1..n.at n=9A081530
• Duplicate of A081530.at n=9A081886
• Numerators of row sums of array of rationals A038566(n)/A020653(n), n>=2.at n=9A111992
• Triangle of numerators in the square of the matrix A[i,j] = 1/i for j <= i, 0 otherwise.at n=56A119947
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, -1, 1), (-1, 1, -1), (0, 1, 0), (1, 0, 0)}.at n=10A149840
• Numerator of the Harary number for the path graph P_n.at n=10A160048
• Numbers such that the sequence of all possible sums of divisors of n is increasing but not strictly so, the sums being ordered by their characteristic functions, seen as binary numbers (see example).at n=22A230492
• a(n) is the length of stage n in A137843.at n=15A291753
• Irregular triangle read by rows: universal linear relationships among polynomial means for even degrees.at n=24A293107