The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A080480

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A080480

Largest number formed by using all the digits (with multiplicity) of next n numbers.
(history; published version)

#13 by Michel Marcus at Sat Jan 23 09:50:30 EST 2021

STATUS

reviewed

approved

#12 by Joerg Arndt at Sat Jan 23 09:21:11 EST 2021

STATUS

proposed

reviewed

#11 by Michael S. Branicky at Sat Jan 23 09:06:51 EST 2021

STATUS

editing

proposed

#10 by Michael S. Branicky at Sat Jan 23 09:06:44 EST 2021

CROSSREFS

Cf. A053067 (next n concatenated), A076068, (smallest without zeros), A080479 (smallest).

#9 by Michael S. Branicky at Sat Jan 23 09:04:53 EST 2021

PROG

(Python)

def a(n):

s = "".join(sorted("".join(map(str, range((n-1)*n//2+1, n*(n+1)//2+1)))))

return int("".join(sorted(s, reverse=True)))

print([a(n) for n in range(1, 15)]) # Michael S. Branicky, Jan 23 2021

STATUS

approved

editing

#8 by Harvey P. Dale at Sat May 13 09:23:25 EDT 2017

STATUS

editing

approved

#7 by Harvey P. Dale at Sat May 13 09:23:18 EDT 2017

LINKS

Harvey P. Dale, <a href="/A080480/b080480.txt">Table of n, a(n) for n = 1..200</a>

STATUS

approved

editing

#6 by Harvey P. Dale at Sat May 13 09:20:44 EDT 2017

STATUS

editing

approved

#5 by Harvey P. Dale at Sat May 13 09:20:36 EDT 2017

DATA

1, 32, 654, 98710, 5432111111, 987622111110, 87654322222222, 9654333333332210, 987544444443333210, 98765555555444443210, 9876666666665555543210, 988777777777776666543210, 99998888888888877654321100, 9999999998765544332211111110000000

MATHEMATICA

FromDigits[Sort[Flatten[IntegerDigits/@#], Greater]]&/@Table[ Reverse[ Range[ (n(n+1))/2+1, ((n+1)(n+2))/2]], {n, 0, 15}] (* Harvey P. Dale, May 13 2017 *)

EXTENSIONS

More terms from Harvey P. Dale, May 13 2017

STATUS

approved

editing

#4 by N. J. A. Sloane at Thu Dec 05 19:56:00 EST 2013

AUTHOR

_Amarnath Murthy (amarnath_murthy(AT)yahoo.com), _, Mar 11 2003

Discussion

Thu Dec 05

19:56

OEIS Server: https://oeis.org/edit/global/2075