Nodes of tree generated as follows: (1,2) is an edge, and if (x,y) is an edge, then (y, y^2 - x^2) and (y, y^2 + x^2) are edges.
A228940
Nodes of tree generated as follows: (1,2) is an edge, and if (x,y) is an edge, then (y, y^2 - x^2) and (y, y^2 + x^2) are edges.
Terms
- a(0) =1a(1) =2a(2) =3a(3) =5a(4) =13a(5) =16a(6) =21a(7) =29a(8) =34a(9) =160a(10) =178a(11) =231a(12) =281a(13) =416a(14) =466a(15) =816a(16) =866a(17) =1131a(18) =1181a(19) =25431a(20) =25769a(21) =31515a(22) =31853a(23) =53105a(24) =53617a(25) =78705a(26) =79217a(27) =172615a(28) =173497a(29) =216715
External references
- oeis: A228940