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A207954 Palindromes with consecutive digits that differ exactly by 1. 2
1, 2, 3, 4, 5, 6, 7, 8, 9, 101, 121, 212, 232, 323, 343, 434, 454, 545, 565, 656, 676, 767, 787, 878, 898, 989, 10101, 12121, 12321, 21012, 21212, 23232, 23432, 32123, 32323, 34343, 34543, 43234, 43434, 45454, 45654, 54345, 54545, 56565, 56765, 65456, 65656 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
MATHEMATICA
Join[Range[9], Select[Range[70000], Union[Abs[Differences[ IntegerDigits[ #]]]] == {1}&&PalindromeQ[#]&]] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Feb 16 2021 *)
PROG
(Haskell)
a207954 n = a207954_list !! (n-1)
a207954_list = filter ((== 1) . a136522) a033075_list
CROSSREFS
Cf. A136522; intersection of A033075 and A002113.
Sequence in context: A071275 A050783 A030147 * A193412 A266139 A154562
KEYWORD
nonn,base
AUTHOR
Reinhard Zumkeller, Feb 21 2012
STATUS
approved

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Last modified July 25 02:39 EDT 2024. Contains 374585 sequences. (Running on oeis4.)