27637

Appears in sequences

• Strong pseudoprimes to base 98.at n=25A020324
• Number of ways to cover (without overlapping) a ring lattice (necklace) of n sites with molecules that are 8 sites wide.at n=48A058365
• Positive numbers y such that y^2 is of the form x^2+(x+953)^2 with integer x.at n=7A160212
• Sum of first k numbers in column k of the natural number array A000027; by antidiagonals.at n=28A185787
• Numbers m such that m - 3 divides m^m + 3.at n=20A252041
• Number of non-abelian groups of order prime(n)^6.at n=23A271811
• Numbers m such that numbers m, m + 1, m + 2 and m + 3 have k, 2k, 3k and 4k divisors respectively.at n=16A340157
• Numbers k such that k, k+1, k+2, k+3 have 2, 3, 4, 5 prime factors respectively, counted with multiplicity.at n=37A363391
• E.g.f. satisfies A(x) = exp(x * (1 + x + x^2 + x^3 + x^4) * A(x^5/120)).at n=7A367757
• Let G_n denote the planar graph defined in A358746 with the addition, if n is odd, of the circle containing the initial n points; sequence gives the number of regions in G_n.at n=20A370976