A226589 Numbers n such that sigma(n) >= sigma(n-2) + sigma(n-1) + sigma(n+1) + sigma(n+2).

183783600, 232792560, 273873600, 367567200, 410810400, 441080640, 465585120, 547747200, 551350800, 575134560, 612612000, 616215600, 698377680, 735134400, 745945200, 821620800, 845404560, 882161280, 908107200, 931170240, 944863920, 958557600, 1102701600, 1127206080

Offset

1,1

Comments

Among first 1000 terms all are such that sigma(n) > sigma(n-2) + sigma(n-1) + sigma(n+1) + sigma(n+2). - Alex Ratushnyak, Jun 16 2013

Links

Donovan Johnson, Table of n, a(n) for n = 1..1000

Example

Sigma(183783598...183783602) = {275675400, 194528880, 929940480, 183783602, 275737500}. Because 929940480 > 275675400 + 194528880 + 183783602 + 275737500, 183783600 is in the sequence.

Crossrefs

Cf. A000203, A215264.

Sequence in context: A180464 A179586 A234384 * A201557 A234050 A253941

Adjacent sequences: A226586 A226587 A226588 * A226590 A226591 A226592

Keyword

nonn

Author

Alex Ratushnyak, Jun 12 2013

Status

approved