Juxtaposition of prime(2n-1) and prime(2n) is a prime.

Terms

a(0) =23a(1) =3137a(2) =8389a(3) =157163a(4) =167173a(5) =233239a(6) =257263a(7) =331337a(8) =353359a(9) =467479a(10) =509521a(11) =523541a(12) =653659a(13) =661673a(14) =677683a(15) =727733a(16) =11871193a(17) =12011213a(18) =12591277a(19) =13671373a(20) =14531459a(21) =16691693a(22) =17091721a(23) =17411747a(24) =21792203a(25) =22072213a(26) =22812287