A088767 a(n) = A087697(n)/2.

5, 6, 12, 15, 18, 27, 30, 33, 45, 48, 60, 72, 78, 87, 93, 102, 117, 132, 135, 138, 150, 162, 180, 183, 195, 213, 225, 228, 258, 282, 285, 297, 300, 303, 312, 327, 333, 342, 363, 375, 390, 402, 408, 423, 435, 480, 492, 495, 513, 528, 555, 558, 597, 612, 615, 642

Offset

1,1

Comments

Numbers n such that 2*n-7 [A089192] and 2*n+7 [A105760] are both prime. [Vincenzo Librandi, Jul 10 2010]

Links

Table of n, a(n) for n=1..56.

Crossrefs

Cf. A087697, A040040, A088763, A088765, A088769.

Cf. A089192, A105760. [Vincenzo Librandi, Jan 18 2009]

Sequence in context: A244368 A185031 A138925 * A032707 A240756 A127306

Adjacent sequences: A088764 A088765 A088766 * A088768 A088769 A088770

Keyword

nonn

Author

Ray Chandler, Oct 26 2003

Status

approved