18774

Appears in sequences

• a(0) = 1, a(n) = 13*n^2 + 2 for n>0.at n=38A010004
• Triangle T(n,k) of series-reduced (or homeomorphically irreducible) labeled graphs with n nodes and k edges, k=0..binomial(n,2).at n=58A060514
• Numbers k that, when expressed in base 6 and then interpreted in base 8, give a multiple of k.at n=20A062937
• Number of compositions of the integer n with strictly smallest part in the first position.at n=23A079501
• G.f.: (x - 1)/(x^5 - x^3 - x^2 - x - 1).at n=63A115412
• Numbers k such that k^6 + 82991 is prime.at n=3A126893
• Expansion of Product_{k>=1} (1 + x^k)^(d(k)-1), where d(k) = number of divisors of k (A000005).at n=40A318844
• Expansion of the generating function of rooted planar Eulerian orientations, counted by edges.at n=5A324312
• Irregular triangle read by rows: T(n,k) = number of homeomorphically irreducible connected labeled graphs with n vertices and k edges, n >= 1, 0 <= k <= n*(n-1)/2.at n=57A331438
• 4*a(n) is the maximum possible determinant of a 3 X 3 matrix whose entries are 9 consecutive primes starting with prime(n).at n=10A340923