130921

Appears in sequences

• The generalized Conway-Guy sequence w^{3}.at n=19A006757
• Expansion of 1/((1-3x)(1-7x)(1-9x)(1-11x)).at n=4A028094
• a(n) = A002720(n) - 1.at n=7A097662
• Decimal representation of the diagonal from the corner to the origin of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 525", based on the 5-celled von Neumann neighborhood.at n=16A288901