102719

Appears in sequences

• Rhombic dodecahedral numbers: a(n) = n^4 - (n - 1)^4.at n=29A005917
• Strong pseudoprimes to base 13.at n=24A020239
• Strong pseudoprimes to base 42.at n=27A020268
• Strong pseudoprimes to base 87.at n=32A020313
• 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=16A066886
• Numbers n such that sigma(phi(n))/sigma(n) = 3.at n=18A067383
• Numbers of pairs (i, j), i, j > 1, such that i^j <= 10^n.at n=9A089363
• Semiprimes of the form p*q where p < q such that q divides p^(q+1) + 1 and (q-p)^(q+1) + 1.at n=21A278921
• Positive integers of the form x^4 - y^4 that have exactly 4 divisors.at n=5A334802