39541

Properties

Appears in sequences

• As p runs through the primes >= 5, sequence gives { numerator of Sum_{k=1..p-1} 1/k } / p^2.at n=5A061002
• Reduced numerators of the raw moments of the distribution of areas for triangles picked at random in a unit square.at n=16A093158
• Largest prime factor of Stirling numbers of first kind s(n,2) = A000254(n).at n=16A120299
• a(n) = squarefree part of A145609(n).at n=8A145738
• Number of (n+1) X (4+1) 0..2 arrays with every 2 X 2 subblock summing to 4 and no 2 X 2 subblock having exactly two nonzero entries.at n=11A251145
• Number of terms in A006285 (de Polignac numbers) less than 10^n.at n=6A254248
• Table, read by rows: row n contains the prime factors of A001008(n) (numerator of n-th harmonic number), with multiplicity.at n=35A308968
• Table, read by rows: row n contains the prime divisors of A001008 (numerator of n-th harmonic number), without repetitions.at n=28A308969
• Largest prime factor of A001008(n), numerator of n-th harmonic number; a(1) = 1.at n=17A308971
• Prime numbersat n=4160