27723

Appears in sequences

• Numbers k such that (k+j) mod (2+j) = 1 for j from 0 to 10 and (k+11) mod 13 <> 1.at n=0A096027
• p^2-p+1 central polygonal numbers with prime indices A002061(prime(n)).at n=38A119959
• Denominators of an Egyptian fraction for 1/Sqrt[21] = 0.21821789...at n=2A144996
• Number of positive solutions to (x_1)^2 + (x_2)^2 + ... + (x_7)^2 <= n^2.at n=5A341426
• a(n) is the smallest number k such that A275235(k) = n.at n=18A354840