45424

Appears in sequences

• Number of conics which pass through 3 points and are bitangent to a general curve of order n.at n=17A060783
• Array: row n shows the coefficients of the characteristic polynomial of the n-th principal submatrix of the symmetric matrix A202869; by antidiagonals.at n=41A202870
• Number of components over all functions on n unlabeled nodes.at n=10A217860
• Number of partitions of n where the difference between consecutive parts is at most 7.at n=43A238867
• Expansion of r(q^4) / r(q)^4 in powers of q where r() is the Rogers-Ramanujan continued fraction.at n=42A285584
• Numbers k such that k and k+1 have the same sum of 5-smooth divisors.at n=29A355713
• a(n) is the number of 2 X 2 matrices with elements 1..n where at least one row and at least one column is strictly increasing.at n=17A390922