30649

Properties

Appears in sequences

• Fourth term of balanced prime quartets: p(m-2)-p(m-3) = p(m-1)-p(m-2) = p(m)-p(m-1).at n=18A054803
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 497", based on the 5-celled von Neumann neighborhood.at n=33A272558
• Number of ways to fill a Young diagram with positive integers summing to n such that the rows are weakly decreasing and the columns are weakly increasing.at n=20A323580
• Primorial base emirps: prime numbers whose primorial base reversal is a different prime.at n=32A333425
• Irregular triangle read by rows: T(n,k) (n>=2, k>=1) is the number of strong digraphs on n nodes with k descents.at n=34A339807
• G.f. A(x) satisfies: A(x) = 1 / (1 + x - 2 * x * A(2*x)).at n=5A348901
• Numbers k that can be written as the sum of a perfect square and a factorial in at least 2 distinct ways.at n=34A358071
• Prime numbersat n=3306