

A075728


Records in abs(sigma(n)2*n) (absolute value of A033879).


5



1, 2, 4, 6, 10, 12, 16, 18, 22, 28, 30, 36, 40, 42, 46, 52, 58, 60, 66, 70, 72, 78, 82, 88, 96, 100, 102, 106, 108, 112, 120, 126, 130, 136, 138, 148, 150, 156, 162, 166, 172, 178, 186, 190, 192, 196, 198, 210, 222, 226, 228, 232, 238, 264, 268, 270, 276, 280, 282, 292, 306
(list;
graph;
refs;
listen;
history;
text;
internal format)



OFFSET

1,2


COMMENTS

RECORDS transform of A033879.


LINKS

R. J. Mathar and Donovan Johnson, Table of n, a(n) for n = 1..1000 (first 220 terms from R. J. Mathar)
N. J. A. Sloane, Transforms


PROG

(PARI) lista(nn) = {rec = 1; for (n=1, nn, d = abs(sigma(n)  2*n); if (d > rec, print1(d, ", "); rec = d; ); ); } \\ Michel Marcus, Nov 02 2013


CROSSREFS

Cf. A033879, A074918. Different from A006093.
Sequence in context: A085477 A128984 A249427 * A146886 A006093 A127965
Adjacent sequences: A075725 A075726 A075727 * A075729 A075730 A075731


KEYWORD

nonn


AUTHOR

N. J. A. Sloane, Oct 03 2002


EXTENSIONS

Corrected name, Michel Marcus, Nov 02 2013


STATUS

approved



