33554424

Appears in sequences

• Number of ways of 4-coloring a map in which there is a central circle surrounded by an annulus divided into n-1 regions. There are n regions in all.at n=20A090860
• 2^n - number of digits of 2^n.at n=25A139817
• a(n) = 8*(2^n - 1).at n=21A159741
• Number of idempotent n X n 0..7 matrices of rank n-1.at n=7A224332
• Decimal representation of the x-axis, from the origin to the right edge, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 617", based on the 5-celled von Neumann neighborhood.at n=25A283350
• a(n) is the number of trailing zeros in (2^n)!.at n=27A354463