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A270297 Numbers which are representable as a sum of seven but no fewer consecutive nonnegative integers. 8

%I #18 Feb 04 2021 18:12:23

%S 28,56,112,196,224,308,364,392,448,476,532,616,644,728,784,812,868,

%T 896,952,1036,1064,1148,1204,1232,1288,1316,1372,1456,1484,1568,1624,

%U 1652,1708,1736,1792,1876,1904,1988,2044,2072,2128,2156,2212,2296,2324,2408,2464

%N Numbers which are representable as a sum of seven but no fewer consecutive nonnegative integers.

%H Ray Chandler, <a href="/A270297/b270297.txt">Table of n, a(n) for n = 1..10000</a>

%F A163169(a(n)) = 7. - _Ray Chandler_, Mar 22 2016

%F a(n) = 28*A229829(n). - _Hugo Pfoertner_, Feb 04 2021

%e 28 = 1 + 2 + 3 + 4 + 5 + 6 + 7;

%e 35 = 2 + 3 + 4 + 5 + 6 + 7 + 8 = 17 + 18 (not in sequence);

%e 56 = 5 + 6 + 7 + 8 + 9 + 10 + 11;

%e 112 = 13 + 14 + 15 + 16 + 17 + 18 + 19.

%Y Cf. A138591, A229829, A270296, A270298, A270299, A270300, A270301, A270302, A270303.

%K nonn

%O 1,1

%A _Martin Renner_, Mar 14 2016

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Last modified April 25 07:53 EDT 2024. Contains 371964 sequences. (Running on oeis4.)