The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A249055

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A249055

a(1)=0; the next term is always the product of the two smallest numbers not yet in the sequence and which have not yet been used.
(history; published version)

#15 by N. J. A. Sloane at Sat Nov 01 13:08:41 EDT 2014

STATUS

editing

approved

#14 by N. J. A. Sloane at Sat Nov 01 13:08:39 EDT 2014

MAPLE

M:=50; A:=[0]; miss:=[seq(n, n=1..M^2)]:

for n from 1 to M do t1:=miss[1]*miss[2]; A:=[op(A), t1];

miss:=[seq(miss[i], i=3..nops(miss))];

miss:=remove('x->x=t1', miss);

od:

A;

STATUS

approved

editing

#13 by N. J. A. Sloane at Sat Nov 01 13:08:24 EDT 2014

STATUS

editing

approved

#12 by N. J. A. Sloane at Sat Nov 01 13:08:21 EDT 2014

KEYWORD

nonn,more,new

STATUS

approved

editing

#11 by N. J. A. Sloane at Sat Nov 01 13:07:20 EDT 2014

STATUS

editing

approved

#10 by N. J. A. Sloane at Sat Nov 01 13:07:18 EDT 2014

DATA

0, 2, 12, 30, 56, 90, 143, 210, 272, 342, 420, 506, 600, 702, 812, 992, 1122, 1260, 1406, 1560, 1722, 1892, 2070, 2256, 2450, 2652, 2862, 3135, 3422, 3660, 3906, 4160, 4422, 4692, 4970, 5256, 5550, 5852, 6162, 6480, 6806, 7140, 7482, 7832, 8372, 8742, 9120, 9506, 9900

STATUS

approved

editing

#9 by N. J. A. Sloane at Sat Nov 01 12:55:59 EDT 2014

STATUS

editing

approved

#8 by N. J. A. Sloane at Sat Nov 01 12:55:56 EDT 2014

EXTENSIONS

Typo in definition corrected by _Douglas Latimer_, Nov 01 2014

#7 by N. J. A. Sloane at Sat Nov 01 12:41:12 EDT 2014

EXTENSIONS

Correction of the description Typo in definition corrected by Douglas Latimer

STATUS

proposed

editing

#6 by Douglas Latimer at Sat Nov 01 11:53:33 EDT 2014

STATUS

editing

proposed

Discussion

Sat Nov 01

12:10

Michel Marcus: In the extension, can you remove "Douglas Latimer" 
and save just with "Correction of the description by "
your name and the date will be added automtically in right format