The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A085557 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing entries 1-10 | older changes

A085557

Numbers that have more prime digits than nonprime digits.
(history; published version)

#26 by Alois P. Heinz at Sat Apr 13 20:08:10 EDT 2024

STATUS

proposed

approved

#25 by Jon E. Schoenfield at Sat Apr 13 19:39:42 EDT 2024

STATUS

editing

proposed

#24 by Jon E. Schoenfield at Sat Apr 13 19:39:30 EDT 2024

NAME

Number of Numbers that have more prime digits > number of than nonprime digits.

STATUS

approved

editing

#23 by Alois P. Heinz at Wed Feb 08 12:38:21 EST 2023

STATUS

reviewed

approved

#22 by Michel Marcus at Wed Feb 08 12:33:45 EST 2023

STATUS

proposed

reviewed

#21 by Chai Wah Wu at Wed Feb 08 12:26:22 EST 2023

STATUS

editing

proposed

#20 by Chai Wah Wu at Wed Feb 08 12:26:12 EST 2023

PROG

(Python)

from itertools import count, islice

def A085557_gen(startvalue=1): # generator of terms

return filter(lambda n:len(s:=str(n))<(sum(1 for d in s if d in {'2', '3', '5', '7'})<<1), count(max(startvalue, 1)))

A085557_list = list(islice(A085557_gen(), 20)) # Chai Wah Wu, Feb 08 2023

STATUS

approved

editing

#19 by Joerg Arndt at Wed Sep 09 03:20:32 EDT 2020

STATUS

reviewed

approved

#18 by Hugo Pfoertner at Mon Sep 07 11:48:49 EDT 2020

STATUS

proposed

reviewed

#17 by David A. Corneth at Sun Sep 06 10:27:12 EDT 2020

STATUS

editing

proposed