49911

Appears in sequences

• Expansion of g.f. 1/((1-x)*(1-2*x)*(1-8*x)).at n=5A016203
• a(n) = Sum_{d|n} sigma(n/d)*d^3.at n=31A027847
• Numbers k such that j(k)*phi(k) = sigma(phi(k)), j(k) = A033831(k).at n=36A033856
• Number of rooted trees with n nodes and 3 leaves.at n=37A055278
• Group the composite numbers so that the sum of the n-th group is a multiple of the n-th prime: (4), (6), (8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 22), (24, 25), (26, 27, 28, 30, 32), (33, 34, ...), ... Sequence gives sum of n-th group.at n=30A074124
• Monotonic ordering of nonnegative differences 4^i-5^j, for 40>= i>=0, j>=0.at n=29A192161
• Number of (n+2)X(1+2) 0..1 arrays x(i,j) with every row sum{j*x(i,j), j=1..1+2} equal, and every column sum{i*x(i,j), i=1..n+2} equal, with upper left element zero.at n=20A232648
• Number of length 4 arrays x(i), i=1..4 with x(i) in i..i+n and no value appearing more than 2 times.at n=13A250353
• Number of partitions of n with rank 4 or higher (the rank of a partition is the largest part minus the number of parts).at n=47A363231