A364657 Numbers k such that sigma(k) > sigma(k+1) > sigma(k+2).

44, 45, 104, 105, 116, 117, 164, 165, 224, 225, 272, 273, 296, 297, 315, 344, 345, 356, 357, 405, 464, 465, 512, 513, 525, 560, 561, 584, 585, 620, 621, 693, 704, 705, 765, 776, 777, 824, 825, 836, 837, 860, 861, 884, 885, 945, 1004, 1005, 1112, 1113, 1125, 1155

Offset

1,1

Links

Seiichi Manyama, Table of n, a(n) for n = 1..10000

Prog

(PARI) isok(n) = sigma(n)>sigma(n+1) && sigma(n+1)>sigma(n+2);

Crossrefs

Cf. A050944, A053226, A364659.

Sequence in context: A242934 A369276 A038400 * A254750 A225619 A121610

Adjacent sequences: A364654 A364655 A364656 * A364658 A364659 A364660

Keyword

nonn,easy

Author

Seiichi Manyama, Aug 01 2023

Status

approved