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A124664 Both n and its reverse are one more than a square. 0
1, 2, 5, 10, 50, 101, 626, 730, 1090, 2210, 5477, 7745, 10001, 10610, 71290, 227530, 1000001, 1010026, 1014050, 1040401, 2217122, 2676497, 5053505, 5631130, 6200101, 6265010, 7946762 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..27.

MATHEMATICA

Select[Range[10000000], IntegerQ[Sqrt[ # - 1]] && IntegerQ[Sqrt[FromDigits[Reverse[IntegerDigits[ # ]]] - 1]] &]

CROSSREFS

A066618 is a subsequence of this sequence of numbers that do not end in 0. The sequence A027720 = Palindromes of form n^2 + 1 - is a palindromic subsequence of this sequence.

Sequence in context: A139010 A018472 A082593 * A076776 A020755 A018503

Adjacent sequences:  A124661 A124662 A124663 * A124665 A124666 A124667

KEYWORD

base,nonn

AUTHOR

Tanya Khovanova, Dec 23 2006

STATUS

approved

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Last modified April 30 08:33 EDT 2017. Contains 285645 sequences.