A280616 Smallest m such that the m - s is a prime for exactly n distinct squarefree numbers s.

3, 4, 9, 8, 16, 18, 26, 32, 24, 36, 42, 44, 48, 66, 70, 60, 74, 72, 94, 106, 84, 90, 102, 112, 130, 108, 126, 114, 166, 160, 150, 144, 184, 218, 174, 208, 168, 220, 138, 222, 232, 204, 216, 262, 302, 268, 234, 252, 246, 240, 264, 276, 306, 270, 340, 318, 294, 312, 342, 336, 406, 330, 324

Offset: 1

Author

Juri-Stepan Gerasimov, Jan 06 2017

Keywords

• nonn

Examples

			a(1) = 3 because 3 - 1 = 2 is prime where 1 is squarefree number.
a(2) = 4 because 4 - 1 = 3 and 4 - 2 = 2 are primes where 1 and 2 are squarefree numbers.
a(3) = 9 because 9 - 2 = 7, 9 - 6 = 3, 9 - 7 = 2 are primes where 2, 6, 7 are squarefree numbers.
		

Crossrefs

Cf. A004767, A005117, A098983, A279027.