A090062 There is (presumably) one and only one palindrome in the Reverse and Add! trajectory of n.

89, 98, 167, 187, 266, 286, 365, 385, 479, 563, 578, 583, 662, 677, 682, 749, 761, 776, 779, 781, 829, 860, 869, 875, 880, 899, 928, 947, 968, 974, 977, 998, 1077, 1093, 1098, 1167, 1183, 1188, 1257, 1273, 1278, 1297, 1347, 1363, 1368, 1387, 1396, 1397, 1437

Offset

1,1

Comments

For terms < 2000 the only palindrome is reached from the start in at most 24 steps; thereafter no further palindrome is reached in 2000 steps.

Links

Table of n, a(n) for n=1..49.

Index entries for sequences related to Reverse and Add!

Example

The trajectory of 479 begins 479, 1453, 4994, 9988, 18887, ...; at 9988 it joins the (presumably) palindrome-free trajectory of A063048(3) = 1997, hence 4994 is the only palindrome in the trajectory of 479 and 479 is a term.

Crossrefs

Cf. A023108, A023109, A065001, A070742, A077594.

Sequence in context: A178917 A159026 A256240 * A166370 A240510 A039437

Adjacent sequences: A090059 A090060 A090061 * A090063 A090064 A090065

Keyword

nonn,base

Author

Klaus Brockhaus, Nov 20 2003

Status

approved