23949

Appears in sequences

• Numbers n such that n | 10^n + 9^n + 8^n + 7^n + 6^n + 5^n + 4^n + 3^n + 2^n.at n=41A057287
• Number of labeled directed multigraphs with n arrows and no vertex of degree 0.at n=4A104209
• Number of partitions of n such that the numbers of prime and composite parts differ by at least 1.at n=48A116450
• E.g.f.: (cosh(2*x) + sinh(2*x)*cosh(x)) / (cosh(x) - sinh(x)*cosh(2*x)).at n=6A245140
• Partial sums of A253089.at n=33A255601
• Number of set partitions of [n] such that for each block b the smallest integer interval containing b has at most five elements.at n=11A276721
• a(0) = 5, a(1) = 8; for n>1, a(n) = 2*a(n-1) + a(n-2).at n=10A277369
• Expansion of g.f. A(x) satisfying 0 = Sum_{n=-oo..+oo} x^n * (1 - x^n/A(-x))^(n+2).at n=13A361766
• Number of ways to write a + b + c = d + e = f with {a,b,c,d,e,f} a subset of [n] of size 6 and a < b < c and d < e.at n=43A362717