A273877 Least positive integer k such that k^3 + (k+1)^3 + ... + (k+n-2)^3 + (k+n-1)^3 is the sum of two positive cubes. a(n) = 0 if no solution exists.

0, 1, 11, 2, 10, 31, 6, 70, 4, 42, 4, 4, 15, 174, 6, 2, 70, 556, 18, 378, 2, 119, 4277, 6, 8, 5, 33111, 3, 2088, 61, 7, 7, 145, 417, 8, 13, 9, 1424, 23, 18, 106, 101, 7, 39, 138, 276, 13353, 48, 1, 31, 645, 2981, 107627, 34, 155, 11, 8, 214, 62, 25, 103, 28

Offset

1,3

Comments

What is the most repeated value of this sequence?

Links

Chai Wah Wu, Table of n, a(n) for n = 1..200

Example

a(3) = 11 because 11^3 + 12^3 + 13^3 = 7^3 + 17^3.

Crossrefs

Cf. A003325, A217843.

Sequence in context: A074335 A367812 A284212 * A066795 A079366 A351653

Adjacent sequences: A273874 A273875 A273876 * A273878 A273879 A273880

Keyword

nonn

Author

Altug Alkan, Jun 02 2016

Extensions

a(10)-a(62) from Giovanni Resta, Jun 03 2016

a(49) corrected by Chai Wah Wu, Jun 07 2016

Status

approved