42893

Appears in sequences

• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 597", based on the 5-celled von Neumann neighborhood.at n=34A273146
• Greatest integer k such that k/2^n < phi^2, where phi = (1+sqrt(5))/2 = golden ratio.at n=14A293319
• Number of counterclockwise n-step spirals on hexagonal lattice where turns of 2*Pi/3 are forbidden.at n=18A309982
• Bases b where exactly eight primes p with p < b exist such that p is a base-b Wieferich prime.at n=19A325884