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Revision History for A286248

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Showing entries 1-10 | older changes
Triangle A286249 reversed.
(history; published version)
#14 by N. J. A. Sloane at Sat Dec 07 12:18:29 EST 2019
PROG

for n in xrangerange(1, 21): print [t(n, k) for k in xrangerange(1, n + 1)][::-1] # Indranil Ghosh, May 08 2017

Discussion
Sat Dec 07
12:18
OEIS Server: https://oeis.org/edit/global/2837
#13 by N. J. A. Sloane at Sat May 13 17:23:55 EDT 2017
STATUS

proposed

approved

#12 by Indranil Ghosh at Sat May 13 15:29:36 EDT 2017
STATUS

editing

proposed

#11 by Indranil Ghosh at Sat May 13 15:29:31 EDT 2017
PROG

def P(n):

f = factorint(n)

def P(n): return sorted([factorint(n)f[i] for i in factorint(n)f])

STATUS

approved

editing

#10 by N. J. A. Sloane at Tue May 09 00:10:55 EDT 2017
STATUS

proposed

approved

#9 by Indranil Ghosh at Mon May 08 14:12:22 EDT 2017
STATUS

editing

proposed

#8 by Indranil Ghosh at Mon May 08 14:12:16 EDT 2017
PROG

for n in xrange(1, 21): print [t(n, k) for k in xrange(1, n + 1)][::-1] # _Indranil Ghosh_, May 08 2017

#7 by Indranil Ghosh at Mon May 08 14:12:00 EDT 2017
PROG

(Python)

from sympy import factorint

import math

def T(n, m): return ((n + m)**2 - n - 3*m + 2)/2

def P(n): return sorted([factorint(n)[i] for i in factorint(n)])

def a046523(n):

x=1

while True:

if P(n) == P(x): return x

else: x+=1

def t(n, k): return 0 if n%k!=0 else T(a046523(n/k), k)

for n in xrange(1, 21): print [t(n, k) for k in xrange(1, n + 1)][::-1]

STATUS

approved

editing

#6 by N. J. A. Sloane at Sat May 06 19:51:53 EDT 2017
STATUS

proposed

approved

#5 by Antti Karttunen at Sat May 06 15:56:39 EDT 2017
STATUS

editing

proposed