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

Offset: 1

Author

Ray G. Opao, Feb 08 2004

Keywords

• nonn

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 ].

Examples

			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.