A090891 30*a(n) is the gap between sexy prime triples in the n-th sexy prime triple triple whose initial term is 17.

18, 21, 49, 130, 1383, 2660, 3245, 5730, 9569, 10735, 11018, 12054, 13528, 18249, 19222, 21483, 22029, 31665, 31899, 37804, 40576, 59322, 59353, 59966, 65020, 65972, 73843, 80938, 82716, 84445, 85365, 89866, 92586, 103639, 105158, 107149

Offset

1,1

Comments

The nine terms in any sexy prime triple triple {{a, b, c}, {d, e, f}, {g, h, i}} may be arranged to form a 3 X 3 magic square [ h a f / c e g / d i b ].

Links

Table of n, a(n) for n=1..36.

Example

a(2)=21 identifies the second sexy prime triple triple whose initial term is 17: {{17, 23, 29}, {17+30*21, 23+30*21, 29+30*21}, {17+2*30*21, 23+2*30*21, 29+2*30*21}} which is equal to {{17, 23, 29}, {647, 653, 659}, {1277, 1283, 1289}}.

Crossrefs

Cf. A023201, A046117.

Sequence in context: A244603 A120416 A293751 * A303298 A358592 A121851

Adjacent sequences: A090888 A090889 A090890 * A090892 A090893 A090894

Keyword

nonn

Author

Ray G. Opao, Feb 16 2004

Status

approved