31303

Appears in sequences

• Centered 47-gonal numbers.at n=36A129428
• Numbers n such that sopfr(n-1) | (n+sopfr(n+1)) and sopfr(n+1) | (n+sopfr(n-1)), where sopfr = A001414 (sum of prime factors with repetition).at n=4A196994
• Solution to the problem of finding the number of comparisons needed for optimal merging of 3 elements with n elements.at n=42A239100
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 65", based on the 5-celled von Neumann neighborhood.at n=36A270085