171271

Properties

Appears in sequences

• Numbers k that divide the sum of the first k partition numbers (A000041) and the sum of the first k unique partition numbers (A000009).at n=16A059218
• Number of (n+2)X5 binary arrays avoiding patterns 000 and 011 in rows, columns and nw-to-se diagonals.at n=8A202772
• Number of n X 4 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 0 1 and 1 1 0 vertically.at n=21A207107
• Emirps (A006567) whose difference with the reversal is a perfect square.at n=24A217386
• Start with the hexagonal tile of the Shield tiling and recursively apply the substitution rule. a(n) is the number of hexagonal tiles after n iterations.at n=10A298678
• Primes of the form 6k + 1 preceding the first-occurrence gaps in A330853.at n=22A330854
• Prime numbersat n=15607