A070792 -id:A070792 - cp's OEIS frontend

A070791 Integers n such that the 'Reverse and Add!' trajectory of n joins the trajectory of 5.

5, 10, 11, 13, 17, 20, 22, 26, 31, 35, 40, 44, 53, 62, 71, 79, 80, 88, 97, 115, 142, 158, 170, 176, 185, 214, 241, 257, 275, 284, 313, 329, 340, 356, 374, 383, 412, 428, 455, 469, 473, 482, 511, 527, 554, 568, 572, 581, 599, 610, 626, 649, 653, 667, 671, 680

Offset: 1

Klaus Brockhaus, May 07 2002

			The trajectory of 10 is part of the trajectory of 5; the trajectory of 340 joins the trajectory of 5 at 88088 after 7 steps.

Index entries for sequences related to Reverse and Add!

Cf. A070788 - A070790, A070792 - A070798, A063049.

limit = 10^3; x = NestList[ # + IntegerReverse[#] &, 5, limit];
Select[Range[680],
 Intersection[NestList[ # + IntegerReverse[#] &, #, limit],
x] != {} &] (* Robert Price, Oct 20 2019 *)

A070793 Integers n such that the 'Reverse and Add!' trajectory of n joins the trajectory of 9.

Original entry on oeis.org

9, 18, 27, 36, 45, 54, 63, 72, 81, 90, 99, 198, 297, 396, 495, 594, 693, 792, 891, 990, 1017, 1035, 1044, 1089, 1107, 1125, 1134, 1179, 1215, 1224, 1269, 1305, 1314, 1359, 1404, 1449, 1539, 1629, 1719, 1809, 1899, 1989, 2016, 2034, 2043, 2088, 2106, 2124

Offset: 1

Klaus Brockhaus, May 07 2002

			The trajectory of 18 is part of the trajectory of 9; the trajectory of 1215 joins the trajectory of 9 at 40293 after 3 steps.

Index entries for sequences related to Reverse and Add!

Cf. A070788 - A070792, A070794 - A070798, A063049.

limit = 10^3; x = NestList[ # + IntegerReverse[#] &, 9, limit];
Select[Range[2124],
 Intersection[NestList[ # + IntegerReverse[#] &, #, limit],
x] != {} &] (* Robert Price, Oct 20 2019 *)

cp's OEIS Frontend

A070791 Integers n such that the 'Reverse and Add!' trajectory of n joins the trajectory of 5.

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