-1220

Appears in sequences

• a(n) = (1 - (-11)^n)/12.at n=3A014993
• Triangle of q-binomial coefficients for q=-11.at n=11A015124
• Triangle of q-binomial coefficients for q=-11.at n=13A015124
• Gaussian binomial coefficient [ n,3 ] for q = -11.at n=1A015279
• McKay-Thompson series of class 20d for Monster.at n=31A058559
• Matrix inverse of triangle A113287.at n=45A113288
• Number of partitions of n with even crank minus number of partitions of n with odd crank.at n=59A124226
• Expansion of phi(-x) * chi(-x) in powers of x where phi(), chi() are Ramanujan theta functions.at n=59A132970
• a(n)=Product_{k=1..floor((n-1)/2)} (1 + 4*cos(k*Pi/n)^2)*(1 - 4*sin(k*Pi/n)^2).at n=15A152191
• Expansion of (1-exp(x))/(1+x^2-exp(x))=sum(n>=0, a(n)*x^n/n!^2).at n=5A191594
• G.f.: 1/(1 + x + 2*x^2 + 2*x^3 + x^4).at n=27A199744
• Trisection 0 of A199744.at n=9A199933
• 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=17A269913
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 225", based on the 5-celled von Neumann neighborhood.at n=25A270945
• Expansion of Product_{k>0} (1 - x^k)^(k*3).at n=15A276552
• Expansion of (1/q) * phi(-q) * phi(q^5) / (f(-q^4) * f(-q^20)) in powers of q where phi(), f() are Ramanujan theta functions.at n=62A298203
• Expansion of (1/q) * phi(q) * phi(-q^5) / (f(-q^4) * f(-q^20)) in powers of q where phi(), f() are Ramanujan theta functions.at n=62A298209
• Square array A(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where column k is the expansion of B(x)^k, where B(x) is the g.f. of A384974.at n=52A384977