39908

Appears in sequences

• Numbers k such that abs(prime(k)-k*tau(k)) < sqrt(k).at n=32A068543
• Sequence S with property (making all terms distinct) that (i) a(1)=3, (ii) for n in S, a(n)=a(1)+a(2)+...+a(n-1), (iii) for n not in S, a(n)=the smallest number different from a(1), ..., a(n-1) not breaking condition (ii).at n=23A121174
• Number of permutations of floor(i*9/7), i=0..n-1, with all sums of 2 through 4 adjacent terms respectively unique.at n=8A147942
• Number of permutations of floor(i*9/7), i=0..n-1, with all sums of 2 through 5 adjacent terms respectively unique.at n=8A147951
• a(n) = 2662*n - 22.at n=14A157609
• Irregular triangle read by rows: T(n,k) is the number of degree-n permutations without overlaps which furnish k new permutations without overlaps upon the addition of an (n+1)st element, 2 <= k <= 1 + floor(n/2).at n=42A259689
• Leading diagonal of triangle in A259689: a(n)= number of permutations without overlaps that generate exactly 2 permutations without overlaps in a(n+1).at n=12A260785
• The growth series for the affine Weyl group F_4.at n=43A266784
• Number of nX5 0..1 arrays with every element equal to 1, 2, 4, 5 or 8 king-move adjacent elements, with upper left element zero.at n=7A298772
• Number of non-strict integer partitions of n with at least one part of odd multiplicity that is not the first or last.at n=41A349796