A379349 Number of integers of the form k^2 + 2 whose greatest prime factor is A033203(n), the n-th prime not congruent to 5 or 7 mod 8.

1, 5, 5, 7, 11, 12, 18, 18, 21, 25, 30, 47, 39, 45, 62, 63, 83, 81, 107, 105, 130

Offset: 1

Author

Andrew Howroyd, Dec 22 2024

Keywords

• nonn
• more

Comments

See A379350 for additional information.

Examples

			Table showing n, p = A033203(n) and a(n):
   1    2    1
   2    3    5
   3   11    5
   4   17    7
   5   19   11
   6   41   12
   7   43   18
   8   59   18
   9   67   21
  10   73   25
  ...
		

Links

• Filip Najman, Smooth values of some quadratic polynomials, Glasnik Matematicki Series III 45 (2010), pp. 347-355.

Crossrefs

Row lengths of A379350.

Cf. A033203, A181471, A379346, A379348.