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

Author

Alex Ratushnyak, Jun 12 2013

Keywords

• nonn

Comments

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

Examples

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

Links

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

Crossrefs

Cf. A000203, A215264.