42220

Appears in sequences

• Positions of A080299 in A014486.at n=25A080298
• Starting positions of strings of three 4's in the decimal expansion of Pi.at n=31A083615
• Recurrence sequence derived from the digits of the square root of 5 after its decimal point.at n=21A189893
• Number of active (ON, black) cells at stage 2^n-1 of the two-dimensional cellular automaton defined by "Rule 577", based on the 5-celled von Neumann neighborhood.at n=7A273023