-2275

Appears in sequences

• Expansion of Product_{k>=1} (1 - x^k)^13.at n=17A010820
• (1/18)*Difference between concatenation of n and n^2 and concatenation of n^2 and n.at n=25A055435
• a(n) = (-1)^(n+1) * n*(n-1)*(n-4)*(n+1)/12.at n=12A167387
• 1-gonal pyramidal numbers.at n=24A254749
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 49", based on the 5-celled von Neumann neighborhood.at n=27A270017
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 313", based on the 5-celled von Neumann neighborhood.at n=27A271203