A090776 - OEIS

A090776

30*a(n) is the gap between sexy prime triples in the n-th sexy prime triple triple whose initial term is 7.

12, 24, 55, 62, 90, 262, 1090, 1245, 1459, 2057, 3043, 3296, 7390, 11625, 13961, 26423, 27557, 29833, 48809, 55711, 68794, 70180, 72554, 78025, 84654, 108590, 112321, 117995, 147101, 160730, 176889, 180829, 184182, 203586, 204116, 217587

(list; graph; refs; listen; history; text; internal format)

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)=24 identifies the second sexy prime triple triple whose initial term is 7: {{7, 13, 19}, {7+30*24, 13+30*24, 19+30*24}, {7+2*30*24, 13+2*30*24, 19+2*30*24}} which is equal to {{7, 13, 19}, {727, 733, 739}, {1447, 1453, 1459}}.

CROSSREFS

Cf. A023201, A046117.

Sequence in context: A369798 A260261 A080495 * A247944 A346865 A123980

Adjacent sequences: A090773 A090774 A090775 * A090777 A090778 A090779

KEYWORD

nonn

AUTHOR

Ray G. Opao, Feb 08 2004

STATUS

approved