3,1

3!=3+3,

4!=11+13,

5!=59+61,

6!=353+367.

p=3,11,59,353,2447,20147,181421,1814347,19958353,239500727,3113510341,43589145527,653837183849;

q=3,13,61,367,2593,20173,181459,1814453,19958447,239500873,3113510459,43589145673,653837184151;

q-p=0,2,2,14,146,26,38,106,94,146,118,146,302.

Sequence in context: A137690 A107007 A028342 this_sequence A074509 A112368 A007807

Adjacent sequences: A137979 A137980 A137981 this_sequence A137983 A137984 A137985

nonn

Zak Seidov (zakseidov(AT)yahoo.com), Apr 29 2008