Sequence a(n) with all (x,y)=(a(2m),a(2m+-1)) satisfying y|x^2+1 and x|y^2+y+1.
A242728
Sequence a(n) with all (x,y)=(a(2m),a(2m+-1)) satisfying y|x^2+1 and x|y^2+y+1.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =25a(4) =93a(5) =346a(6) =1291a(7) =4817a(8) =17977a(9) =67090a(10) =250383a(11) =934441a(12) =3487381a(13) =13015082a(14) =48572947a(15) =181276705a(16) =676533873a(17) =2524858786a(18) =9422901271a(19) =35166746297a(20) =131244083917a(21) =489809589370
External references
- oeis: A242728