42991

Appears in sequences

• Total preorders.at n=9A006328
• Expansion of (1+x^4*C^2)*C^3, where C = (1-(1-4*x)^(1/2))/(2*x) is g.f. for Catalan numbers, A000108.at n=9A071748
• Expansion of Sum_{p prime, i>=2} x^(p^i)/(1 - x^(p^i)) / Product_{j>=1} (1 - x^j).at n=38A281611
• The base 10 numbers with a digit product > 0 and which when written in bases 3,4,5,6,7,8,9 have two or more other base representations with the same digit product.at n=20A331565
• Numerators of the convergents given by treating A084580 as continued fraction coefficients after the leading 0.at n=16A390651