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A198387 Common differences in triples of squares in arithmetic progression. 11
24, 96, 120, 216, 240, 384, 336, 480, 600, 840, 864, 960, 840, 1176, 720, 1080, 1536, 1344, 1944, 1920, 2160, 2400, 1320, 2520, 2904, 2016, 3360, 3456, 3000, 3696, 4056, 3840, 3024, 3360, 2184, 4704, 2880, 4320, 5280, 5400, 6144, 5544, 6000, 6936, 6240, 5880 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

a(n) = A198385(n) - A198384(n) = A198386(n) - A198385(n).

A198438(n) = a(aA198409(n)).

LINKS

Ray Chandler, Table of n, a(n) for n = 1..10000

Reinhard Zumkeller, Table of initial values

Keith Conrad, Arithmetic progressions of three squares

PROG

(Haskell)

a198387 n = a198387_list !! (n-1)

a198387_list = zipWith (-) a198385_list a198384_list

CROSSREFS

Sequence in context: A208984 A103251 A256418 * A057102 A057103 A055669

Adjacent sequences:  A198384 A198385 A198386 * A198388 A198389 A198390

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Oct 24 2011

STATUS

approved

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Last modified March 4 07:25 EST 2021. Contains 341781 sequences. (Running on oeis4.)