The number of edges on a piece of paper that has been folded n times (see comments for more precise definition).

A133257

The number of edges on a piece of paper that has been folded n times (see comments for more precise definition).

Terms

    a(0) =4a(1) =7a(2) =11a(3) =17a(4) =25a(5) =37a(6) =53a(7) =77a(8) =109a(9) =157a(10) =221a(11) =317a(12) =445a(13) =637a(14) =893a(15) =1277a(16) =1789a(17) =2557a(18) =3581a(19) =5117a(20) =7165a(21) =10237a(22) =14333a(23) =20477a(24) =28669a(25) =40957a(26) =57341a(27) =81917a(28) =114685a(29) =163837

External references