A270296 Numbers which are representable as a sum of five but no fewer consecutive nonnegative integers.

20, 40, 80, 100, 140, 160, 200, 220, 260, 280, 320, 340, 380, 400, 440, 460, 500, 520, 560, 580, 620, 640, 680, 700, 740, 760, 800, 820, 860, 880, 920, 940, 980, 1000, 1040, 1060, 1100, 1120, 1160, 1180, 1220, 1240, 1280, 1300, 1340, 1360, 1400, 1420, 1460

Offset

1,1

Links

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

Formula

A163169(a(n)) = 5. - Ray Chandler, Mar 22 2016

a(n) = 20*A001651(n). - Hugo Pfoertner, Feb 04 2021

Example

15 = 1 + 2 + 3 + 4 + 5 = 7 + 8 (not in sequence);
20 = 2 + 3 + 4 + 5 + 6;
40 = 6 + 7 + 8 + 9 + 10;
80 = 14 + 15 + 16 + 17 + 18.

Crossrefs

Cf. A001651, A138591, A270297, A270298, A270299, A270300, A270301, A270302, A270303.

Sequence in context: A008602 A061830 A235282 * A338433 A347368 A041790

Adjacent sequences: A270293 A270294 A270295 * A270297 A270298 A270299

Keyword

nonn

Author

Martin Renner, Mar 14 2016

Status

approved