161595

Appears in sequences

• Expansion of 1/((1-6*x)*(1-9*x)).at n=5A016172
• Related to 9-factorial numbers A045756.at n=3A035097
• Odd numbers k such that k and phi(k) have the same number of divisors.at n=6A116518
• Difference between sum of largest parts and sum of smallest parts of all partitions of n into an even number of parts.at n=39A211881
• Common denominator of coefficients in Nörlund's polynomial D_{2n}(x).at n=9A260326
• Leading coefficients of numerators of Norlund's B_{nu}^(n) polynomials (Nørlund, Tafel 5, p. 459).at n=18A290030