The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A363919 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing entries 1-10 | older changes

A363919

a(n) = n^excess(n), where excess(n) = A046660(n).
(history; published version)

#36 by Peter Luschny at Wed Jul 19 01:02:19 EDT 2023

STATUS

editing

approved

#35 by Peter Luschny at Wed Jul 19 01:02:15 EDT 2023

FORMULA

a(n) > 1 is odd <=> n = A053850(n).

STATUS

approved

editing

#34 by Michael De Vlieger at Tue Jul 18 12:25:57 EDT 2023

STATUS

reviewed

approved

#33 by Michel Marcus at Tue Jul 18 10:58:44 EDT 2023

STATUS

proposed

reviewed

#32 by Chai Wah Wu at Tue Jul 18 10:45:16 EDT 2023

STATUS

editing

proposed

#31 by Chai Wah Wu at Tue Jul 18 10:45:12 EDT 2023

PROG

(Python)

from sympy import factorint

def A363919(n): return n**sum(map(lambda e:e-1, factorint(n).values())) # Chai Wah Wu, Jul 18 2023

STATUS

approved

editing

#30 by Alois P. Heinz at Tue Jul 18 10:30:16 EDT 2023

STATUS

proposed

approved

#29 by Michel Marcus at Tue Jul 18 10:06:31 EDT 2023

STATUS

editing

proposed

#28 by Michel Marcus at Tue Jul 18 10:06:25 EDT 2023

LINKS

Plot2 <a href="/A363919/a363919.jpg">A363923vsA205959A363923 vs A205959</a>.

STATUS

approved

editing

#27 by Peter Luschny at Tue Jul 18 09:40:23 EDT 2023

STATUS

editing

approved