A270296 - OEIS

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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

(list; graph; refs; listen; history; text; internal format)

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;