The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A071228

(Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing entries 1-10 | older changes

A071228

a(n) = n*(n-th composite number).
(history; published version)

#31 by Michael De Vlieger at Sat Jun 25 21:43:19 EDT 2022

STATUS

proposed

approved

#30 by Sean A. Irvine at Sat Jun 25 19:57:52 EDT 2022

STATUS

editing

proposed

#29 by Sean A. Irvine at Sat Jun 25 19:57:49 EDT 2022

CROSSREFS

Partial sums of A092930.

STATUS

approved

editing

#28 by Peter Luschny at Sun Sep 01 08:54:00 EDT 2019

STATUS

reviewed

approved

#27 by Joerg Arndt at Sun Sep 01 01:43:16 EDT 2019

STATUS

proposed

reviewed

#26 by Michel Marcus at Sat Aug 31 13:31:41 EDT 2019

STATUS

editing

proposed

Discussion

Sat Aug 31

17:34

Michel Marcus: A171521 is like A171520

#25 by Michel Marcus at Sat Aug 31 13:29:10 EDT 2019

COMMENTS

Complement of A171521(n). - Jaroslav Krizek, Dec 13 2009

STATUS

proposed

editing

#24 by Michel Marcus at Sat Aug 31 13:05:51 EDT 2019

STATUS

editing

proposed

#23 by Michel Marcus at Sat Aug 31 13:02:21 EDT 2019

PROG

(PARI) lista(nn) = {my(nc = 0); forcomposite(c=1, nn, nc ++; print1(c*nc, ", "); ); } \\ Michel Marcus, Aug 31 2019

CROSSREFS

Cf. A002808, A033286, A171521.

STATUS

approved

editing

#22 by Bruno Berselli at Tue Dec 23 04:21:38 EST 2014

STATUS

reviewed

approved