39775

Appears in sequences

• Rhombic dodecahedral numbers: a(n) = n^4 - (n - 1)^4.at n=21A005917
• a(n) = n*(n^2 + 1)/2.at n=43A006003
• Sum of the elements in any transversal of a prime(n) X prime(n) array containing the numbers from 1 to prime(n)^2 in standard order.at n=13A066886
• Numbers k for which 10k + 1, 10k + 3, 10k + 7, 10k + 9 and 10k + 13 are primes.at n=20A178084
• a(1) = 1; a(n+1) = Sum_{k=1..n} lcm(a(k),n)/n.at n=22A292303
• a(n) = (1/2)*(n^3 + n*(n mod 2)).at n=42A317614