A025418 Least sum of 3 positive cubes in exactly n ways.

3, 251, 5104, 13896, 161568, 1296378, 2016496, 2562624, 14926248, 34012224, 69190848, 150547032, 119095488, 1204376256, 952763904, 1592865000, 3974344704, 2176782336, 10077696000, 2985984000, 36330467328, 30723115968, 23887872000, 17414258688, 72825163776, 75686967000, 204141384000, 62099136000, 139314069504, 245784927744, 80621568000, 191102976000, 272097792000, 373248000000

Offset: 1

Author

David W. Wilson

Keywords

• nonn

Comments

a(36) = 496793088000. a(37) = 980922617856. a(38) = 209584584000. a(39) = 644972544000. a(42) = 970299000000. - Donovan Johnson

References

• J.-M. De Koninck, Ces nombres qui nous fascinent, Entry 251, p. 69, Ellipses, Paris 2008.

Formula

{min k: A025456(k) = n}. - R. J. Mathar, Jun 15 2018

Extensions

More terms from Lekraj Beedassy, Jul 20 2008

a(9) corrected and a(11)-a(34) from Donovan Johnson, Nov 13 2010