The On-Line Encyclopedia of Integer Sequences (OEIS)

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A099469

Least common multiple of n and its digit sum.
(history; published version)

#4 by Jon E. Schoenfield at Thu Jul 16 00:34:06 EDT 2015

STATUS

editing

approved

#3 by Jon E. Schoenfield at Thu Jul 16 00:34:04 EDT 2015

MATHEMATICA

f[n_] := LCM[n, Plus @@ IntegerDigits[n]]; Table[ f[n], {n, 63}] (from * _Robert G. Wilson v _, Nov 20 2004 *)

STATUS

approved

editing

#2 by Russ Cox at Fri Mar 30 17:31:07 EDT 2012

COMMENTS

a(n)=n for Niven (or Harshad) numbers (A005349). - _Robert G. Wilson v (rgwv(AT)rgwv.com), _, Nov 20 2004

EXTENSIONS

More terms from _Robert G. Wilson v (rgwv(AT)rgwv.com), _, Nov 20 2004

Discussion

Fri Mar 30

17:31

OEIS Server: https://oeis.org/edit/global/156

#1 by N. J. A. Sloane at Sun Feb 20 03:00:00 EST 2005

NAME

Least common multiple of n and its digit sum.

DATA

1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 22, 12, 52, 70, 30, 112, 136, 18, 190, 20, 21, 44, 115, 24, 175, 104, 27, 140, 319, 30, 124, 160, 66, 238, 280, 36, 370, 418, 156, 40, 205, 42, 301, 88, 45, 230, 517, 48, 637, 50, 102, 364, 424, 54, 110, 616, 228, 754, 826, 60, 427, 248, 63

OFFSET

1,2

COMMENTS

a(n)=n for Niven (or Harshad) numbers (A005349). - Robert G. Wilson v (rgwv(AT)rgwv.com), Nov 20 2004

MATHEMATICA

f[n_] := LCM[n, Plus @@ IntegerDigits[n]]; Table[ f[n], {n, 63}] (from Robert G. Wilson v Nov 20 2004)

KEYWORD

base,easy,nonn

AUTHOR

Gaetan Polard (gaetan27(AT)hotmail.com), Nov 18 2004

EXTENSIONS

More terms from Robert G. Wilson v (rgwv(AT)rgwv.com), Nov 20 2004

STATUS

approved