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A101421 Numbers which are the sum of two positive cubes and divisible by 7. 6
28, 35, 91, 126, 133, 189, 217, 224, 280, 539, 637, 686, 728, 756, 854, 945, 1001, 1008, 1064, 1358, 1456, 1512, 1547, 1729, 1736, 1792, 2198, 2205, 2240, 2261, 2331, 2457, 2709, 2926, 3059, 3087, 3402, 3500, 3528, 3591, 4123, 4221, 4312, 4375, 4914, 4921 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

MATHEMATICA

Select[Union[Total/@(Tuples[Range[17], 2]^3)], Divisible[#, 7]&] (* Harvey P. Dale, Oct 08 2012 *)

CROSSREFS

Cf. A003325.

Sequence in context: A146077 A260637 A143186 * A039347 A043170 A043950

Adjacent sequences:  A101418 A101419 A101420 * A101422 A101423 A101424

KEYWORD

nonn

AUTHOR

Jun Mizuki (suzuki32(AT)sanken.osaka-u.ac.jp), Jan 17 2005

EXTENSIONS

Changed offset from 0 to 1 by Vincenzo Librandi, May 08 2013

STATUS

approved

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Last modified March 29 13:17 EDT 2017. Contains 284270 sequences.