91863

Appears in sequences

• Number of secondary structures of size n with no stacks of length >=2.at n=17A202850
• G.f.: 1/(1 - x/(1 - x^4/(1 - x^7/(1 - x^10/(1 - x^13/(1 - x^16/(1 -...- x^(3*n-2)/(1 -...)))))))), a continued fraction.at n=37A206737
• Molien series for invariants of finite Coxeter group D_12 (bisected).at n=47A266775
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 969", based on the 5-celled von Neumann neighborhood.at n=40A273849