18475

Appears in sequences

• a(n) = floor(binomial(n,10)/10).at n=20A011856
• a(n) = [ C(2n,n)/n ].at n=9A024498
• a(n) = n^3 + 114 * n.at n=24A122562
• Indices n such that A134204(n) < n.at n=26A133242
• a(n) = Sum_{k<=n} A000203(k)*(n-k+1), where A000203(m) is the sum of divisors of m.at n=39A175254
• Number of distinct solutions of sum{i=1..10}(x(2i-1)*x(2i)) = 1 (mod n), with x() only in 1..n-1.at n=4A180792
• Sum of all region numbers of all parts of all partitions of n.at n=11A210972
• a(n) is the Wiener index of a broom on 2n vertices of which n+2 are pendant.at n=27A349416
• Starts of runs of 3 consecutive integers whose exponent of least prime factor in their prime factorization is even.at n=33A365871
• Number of integer partitions of n that cannot be partitioned into a set of sets.at n=41A382078