110630

Appears in sequences

• Coefficient of x^5 in expansion of (1 + x + x^2)^n.at n=22A000574
• Expansion of Product_{k>=1} 1/(1 - 2*t^k).at n=15A070933
• Number of positions that are exactly n moves from the starting position in the Lights Out 2000 puzzle.at n=5A079875
• a(n) is the smallest number such that twice the number of divisors of (a(n)-n)/3 gives the n-th term in the first differences of the sequence produced by the Flavius Josephus sieve, A000960.at n=37A130826
• Number of composites removed in each step in the Sieve of Eratosthenes for 10^8.at n=27A227797