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A087672 n = k^2 - (reversal of k)^2 for two different values of k. 0
891, 1485, 1584, 2376, 3168, 4455, 4752, 89991, 95931, 101871, 107811, 149985, 155925, 159984, 161865, 167805, 167904, 175824, 183744, 191664, 239976, 247896, 255816, 263736, 271656, 319968, 327888, 335808, 343728, 351648, 449955, 479655 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

COMMENTS

Each n is a multiple of 99. The first few pairs for k: (30,54) (41,87) (40,53) (51,75) (62,97) (72,96) (71,84) (300,504) (310,534) (320,564) (330,594) (401,807) (411,837) (400,503) (421,867) (431,897) (410,523) (420,543) (430,563) (440,583).

LINKS

Table of n, a(n) for n=0..31.

EXAMPLE

2376 = 51^2 - 15^2 = 75^2 - 57^2; 161865 = 421^2 - 124^2 = 867^2 - 768^2

CROSSREFS

Sequence in context: A266915 A124666 A125303 * A284842 A083827 A268876

Adjacent sequences:  A087669 A087670 A087671 * A087673 A087674 A087675

KEYWORD

nonn

AUTHOR

Paul Lusch, Sep 26 2003

STATUS

approved

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Last modified December 19 10:10 EST 2018. Contains 318246 sequences. (Running on oeis4.)