A270306 - OEIS

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A270306

Smallest number which is representable as a sum of n but no fewer consecutive nonnegative integers, or 0 for n > 1 if no such number exists.

0, 1, 6, 10, 20, 0, 28, 44, 0, 0, 88, 0, 104, 0, 0, 136, 272, 0, 304, 0, 0, 0, 368, 0, 0, 0, 0, 0, 464, 0, 496, 592, 0, 0, 0, 0, 1184, 0, 0, 0, 1312, 0, 1376, 0, 0, 0, 1504, 0, 0, 0, 0, 0, 1696, 0, 0, 0, 0, 0, 1888, 0, 1952, 0, 0, 2144, 0, 0, 4288, 0, 0, 0, 4544

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OFFSET

1,3

LINKS

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

FORMULA

a(A111774(n)) = 0.

a(A174090(n)) = A163172(n).

EXAMPLE

a(2) = 1 = 0 + 1 (two but no fewer terms)

a(3) = 6 = 1 + 2 + 3 (three but no fewer terms)

a(4) = 10 = 1 + 2 + 3 + 4 (four but no fewer terms)