-724

Appears in sequences

• Difference between number of nonprimes and primes in reduced residue system of primorial numbers.at n=6A048980
• Coefficients of the '6th-order' mock theta function lambda(q).at n=27A053272
• McKay-Thompson series of class 40b for Monster.at n=55A058666
• Expansion of (1-x)/(1+x+2*x^2).at n=28A078050
• Inverse binomial transform of number-theoretic triangle A109974.at n=61A109978
• Choose smallest m>0 such that the n-th rational prime p ramifies in the imaginary quadratic extension field K = Q(sqrt(-m)); a(n) = discriminant(K).at n=41A220861
• Expansion of 1 / (1 + x^4 - x^5) in powers of x.at n=53A247919
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 3", based on the 5-celled von Neumann neighborhood.at n=13A269913
• Expansion of r(q)^4 / r(q^4) in powers of q where r() is the Rogers-Ramanujan continued fraction.at n=25A285629
• Expansion of Product_{k>=1} (1 - Sum_{j>=1} j * x^(k*j)).at n=21A329157