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A081941 a(1) = 1; for n>1, a(n)= smallest number greater than the previous term such that a(n-1)*a(n) + 1 is a palindrome. 1
1, 2, 3, 7, 14, 23, 32, 45, 153, 167, 352, 3610, 4977, 11332, 27866, 46955, 275824, 508960, 1978100, 5211763, 22579170, 50936903, 98746668, 103408400, 105030502, 106085805, 115059404, 458335581, 2483842510, 4847757902, 6623606611 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..31.

EXAMPLE

3 is followed by 7 because 3*4+1, 3*5+1 and 3*6+1 aren't palindromes, but 3*7+1 = 22 is.

CROSSREFS

Cf. A082270.

Sequence in context: A082270 A055688 A241583 * A225879 A027957 A300569

Adjacent sequences:  A081938 A081939 A081940 * A081942 A081943 A081944

KEYWORD

base,nonn

AUTHOR

Amarnath Murthy, Apr 02 2003

EXTENSIONS

More terms from David Wasserman, Jul 16 2004

STATUS

approved

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Last modified August 6 00:36 EDT 2021. Contains 346493 sequences. (Running on oeis4.)