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A182940 List of divisors of the sequence A094348 in their order of occurrence. 1
1, 2, 4, 3, 6, 12, 8, 24, 9, 18, 36, 16, 48, 5, 10, 15, 20, 30, 60, 72, 40, 120, 45, 90, 180, 80, 240, 360, 7, 14, 21, 28, 35, 42, 70, 84, 105, 140, 210, 420, 144, 720, 56, 168, 280, 840 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Read A094348 term-by-term, compute the divisors of each term, write down any divisors not seen before.
LINKS
EXAMPLE
1 [1]
2 [2]
4 [4]
6 [3, 6]
12 [12]
24 [8, 24]
36 [9, 18, 36]
48 [16, 48]
60 [5, 10, 15, 20, 30, 60]
72 [72]
120 [40, 120]
180 [45, 90, 180]
240 [80, 240]
360 [360]
420 [7, 14, 21, 28, 35, 42, 70, 84, 105, 140, 210, 420]
720 [144, 720]
840 [56, 168, 280, 840]
1260 [63, 126, 252, 315, 630, 1260]
1680 [112, 336, 560, 1680]
2520 [504, 2520]
5040 [1008, 5040]
MAPLE
concat := (a, h)->[op(a), op(sort(convert(h, list)))];
DivisorsInOrder := proc(S) local A, H, T, s;
T := {}; A := [];
for s in S do
H := numtheory[divisors](s) minus T:
if H <> {} then
A := concat(A, H);
T := T union H
fi
od;
A end:
A182940 := DivisorsInOrder(A094348);
CROSSREFS
Sequence in context: A120947 A222600 A046793 * A101278 A329902 A366028
KEYWORD
nonn
AUTHOR
Peter Luschny, Jan 04 2011
STATUS
approved

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Last modified March 29 08:44 EDT 2024. Contains 371266 sequences. (Running on oeis4.)