The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A044973 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing entries 1-10 | older changes

A044973

Numbers whose base-3 representation contains exactly one 0 and three 1's.
(history; published version)

#24 by Joerg Arndt at Wed Jul 26 03:21:00 EDT 2023

STATUS

proposed

approved

#23 by Jon E. Schoenfield at Wed Jul 26 01:26:16 EDT 2023

STATUS

editing

proposed

#22 by Jon E. Schoenfield at Wed Jul 26 01:26:13 EDT 2023

NAME

Numbers whose base-3 representation includes contains exactly one 0 and three 1's.

STATUS

approved

editing

#21 by Bruno Berselli at Wed Apr 21 04:27:24 EDT 2021

STATUS

reviewed

approved

#20 by Joerg Arndt at Wed Apr 21 03:53:59 EDT 2021

STATUS

proposed

reviewed

#19 by Felix Fröhlich at Wed Apr 21 03:08:27 EDT 2021

STATUS

editing

proposed

#18 by Felix Fröhlich at Wed Apr 21 03:08:13 EDT 2021

CROSSREFS

Cf. A007089 (numbers in base 3), A044971 (1 zero 1 one), A044972 (1 zero 2 ones), A044974 (1 zero 4 ones).

Cf. A044971, A044972, A044974.

#17 by Felix Fröhlich at Wed Apr 21 03:04:40 EDT 2021

CROSSREFS

Cf. A044971, A044972, A044974.

STATUS

proposed

editing

#16 by Michel Marcus at Wed Apr 21 02:42:26 EDT 2021

STATUS

editing

proposed

#15 by Michel Marcus at Wed Apr 21 02:42:22 EDT 2021

PROG

(PARI) isok(k) = my(d=digits(k, 3)); (#select(x->(x==0), d) == 1) && (#select(x->(x==1), d) == 3); \\ Michel Marcus, Apr 21 2021

CROSSREFS

Cf. A007089 (numbers in base 3).

STATUS

approved

editing