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Revision History for A189394

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

A189394

Highly composite numbers whose number of divisors is also highly composite.
(history; published version)

#32 by N. J. A. Sloane at Thu May 25 07:08:37 EDT 2023

STATUS

reviewed

approved

#31 by Joerg Arndt at Thu May 25 05:35:39 EDT 2023

STATUS

proposed

reviewed

#30 by Michel Marcus at Thu May 25 05:25:21 EDT 2023

STATUS

editing

proposed

#29 by Michel Marcus at Thu May 25 05:25:06 EDT 2023

PROG

(PARI) is_A189394(n)={is_A002182(numdiv(n)) && is_A002182(n)}

M189394=[1, 2]/*for memoization*/; A189394(n)={if(#M189394<n, my(s=self()(n-2), k=self()(n-1)\/s); while(!is_A189394(k++*s), ); M189394=concat(PARIM189394, k*s)) From _; M189394[n]} \\ _M. F. Hasler_, Jun 20 2022: (Start)

is_A189394(n)={is_A002182(numdiv(n)) && is_A002182(n)}

M189394=[1, 2]/*for memoization*/; A189394(n)={if(#M189394<n, my(s=self()(n-2), k=self()(n-1)\/s); while(!is_A189394(k++*s), ); M189394=concat(M189394, k*s)); M189394[n]} \\ (End)

KEYWORD

nonn,more,fini,full,changed

EXTENSIONS

Keywords fini and full, following Øverlier's thesis, added by Michel Marcus, May 25 2023

STATUS

proposed

editing

#28 by Michel Marcus at Thu May 25 04:25:26 EDT 2023

STATUS

editing

proposed

#27 by Michel Marcus at Thu May 25 04:20:31 EDT 2023

LINKS

A. Achim Flammenkamp, <a href="http://wwwhomes.uni-bielefeld.de/achim/highly.txt">Highly composite numbers</a>

STATUS

reviewed

editing

Discussion

Thu May 25

04:25

Michel Marcus: in view of the new link, should we replace more with fini,full  ? (question raised by Amiram)

#26 by Joerg Arndt at Thu May 25 01:24:08 EDT 2023

STATUS

proposed

reviewed

#25 by Joerg Arndt at Thu May 25 01:24:05 EDT 2023

STATUS

editing

proposed

#24 by Joerg Arndt at Thu May 25 01:23:57 EDT 2023

NAME

Highly composite numbers whose number of divisors is also a highly composite number.

STATUS

proposed

editing

#23 by Michel Marcus at Wed May 24 23:58:03 EDT 2023

STATUS

editing

proposed