68896

Appears in sequences

• Number of active (ON, black) cells at stage 2^n-1 of the two-dimensional cellular automaton defined by "Rule 206", based on the 5-celled von Neumann neighborhood.at n=8A270734
• Number of n X 5 0..1 arrays with every element unequal to 0, 2, 3, 5 or 6 king-move adjacent elements, with upper left element zero.at n=7A304673
• Integers k such that the length of decimal expansion of k^k is a repdigit.at n=27A330192
• Infinite sum of the natural numbers, compacted (see comments for an explanation).at n=24A336897