A100793 Beginning with 1, least natural number such that sum as well the difference of successive terms are both palindromes, otherwise 0 if no such term exists.

1, 2, 3, 4, 5, 6, 105, 97, 64, 57, 54, 45, 43, 34, 32, 23, 21, 12, 10, 111, 212, 91, 80, 71, 60, 51, 48, 40, 37, 29, 26, 18, 15, 7, 0, 8, 14, 19, 25, 30, 36, 41, 47, 52, 49, 50, 61, 70, 81, 90, 101, 202, 191, 182, 171, 20, 13, 9, 0, 11, 22, 33, 44, 55, 46, 42, 35, 31, 24, 0

Offset

0,2

Links

Table of n, a(n) for n=0..69.

Example

a(6)=105 since 105 + 6 = 111 and 105 - 6 = 99 both are palindromes and 105 is the least unused natural number for which this is true.
a(34)=a(58)=a(69)=0 since no unused natural numbers exist.

Crossrefs

Sequence in context: A037438 A171596 A318909 * A099145 A004868 A073788

Adjacent sequences: A100790 A100791 A100792 * A100794 A100795 A100796

Keyword

base,nonn

Author

Amarnath Murthy, Dec 04 2004

Extensions

Edited, corrected and extended by Mark Hudson (mrmarkhudson(AT)hotmail.com) and Ray Chandler, Dec 06 2004

Status

approved