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

1,1

Links

Table of n, a(n) for n=1..63.

Example

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.

Sequence in context: A242219 A106833 A217578 * A317099 A317715 A372121

Adjacent sequences: A280613 A280614 A280615 * A280617 A280618 A280619

Keyword

nonn

Author

Juri-Stepan Gerasimov, Jan 06 2017

Status

approved