-86

Appears in sequences

• From fundamental unit of Z[ (-d)^{1/4} ], where d runs over positive integers not of the form 4*k^4.at n=11A006828
• Percolation series for directed hexagonal lattice.at n=9A006836
• G.f.: Product_{k>0} (1-x^(5k-1))*(1-x^(5k-4))/((1-x^(5k-2))*(1-x^(5k-3))).at n=56A007325
• Reversion of g.f. for Fibonacci numbers 1, 1, 2, 3, 5, ....at n=10A007440
• Euler characteristic of mapping class group Gamma_n.at n=9A007888
• Partition function coefficients for square lattice spin 2 Ising model.at n=42A010108
• Partition function coefficients for square lattice spin 5/2 Ising model.at n=54A010109
• Expansion of Product_{m>=1} 1/(1 + m*q^m).at n=13A022693
• a(n) = Sum_{k=1..n} (-1)^k*k*floor(n/k).at n=58A024919
• 9th differences of primes.at n=7A036270
• Column 1 of Inverse partition triangle A038498.at n=57A039800
• Triangle a(n,k) (1<=k<=n) of "signed Eulerian numbers" read by rows.at n=39A049061
• Triangle a(n,k) (1<=k<=n) of "signed Eulerian numbers" read by rows.at n=41A049061
• Partition function coefficients for square lattice spin 3 Ising model.at n=66A056620
• Numbers k such that 36*k^2 + 12*k + 7 is prime (sorted by absolute values with negatives before positives).at n=30A056910
• McKay-Thompson series of class 14b for Monster.at n=48A058506
• Expansion of (1-x-x^N)/((1-x)(1-x^2)(1-x^3)...(1-x^N)) for N = 7.at n=24A060026
• a(n) = 2*n*mu(n).at n=42A062004
• A measure of how close the golden ratio is to rational numbers.at n=26A066212
• Differences between the primes generating the n-th prime power.at n=54A068389