A087672 n = k^2 - (reversal of k)^2 for two different values of k.

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

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