30483

Appears in sequences

• Numbers k such that 10*3^k - 1 is prime.at n=43A005542
• E.g.f.: exp( 1/(1-x)^3 - 1 ).at n=5A202826
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 401", based on the 5-celled von Neumann neighborhood.at n=36A271805
• Square array A(n,k), n >= 0, k >= 0, read by antidiagonals, where column k is the expansion of e.g.f.: exp(1/(1-x)^k - 1).at n=41A294046
• Number of Motzkin trees that are a "uniquely typable skeleton".at n=20A300130