Solutions a(n) of (a(n)-5)*(a(n)-6) = 21*b(n)*(b(n)-1).

Terms

a(0) =6a(1) =12a(2) =26a(3) =104a(4) =159a(5) =741a(6) =2267a(7) =10841a(8) =16890a(9) =80904a(10) =248750a(11) =1191812a(12) =1857147a(13) =8898105a(14) =27359639a(15) =131087885a(16) =204268686a(17) =978710052a(18) =3009310946a(19) =14418474944a(20) =22467697719a(21) =107649207021a(22) =330996843827