87973

Properties

Appears in sequences

• Irregular triangle E(n,g) counting not necessarily connected 4-regular simple graphs on n vertices with girth exactly g.at n=15A185140
• Number of not necessarily connected 4-regular simple graphs on n vertices with girth exactly 3.at n=14A185143
• Zeroless numbers k such that k - (sum of digits of k) and k - (product of digits of k) contain the same distinct digits as k.at n=32A248717
• Primes p such that p^10 - 1 has 256 divisors.at n=5A342066
• Numerators of the partial sums of the reciprocals of the sum of bi-unitary divisors function (A188999).at n=20A379615
• Prime numbersat n=8541