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A353561
Prime shadows of colossally abundant numbers, A004490.
3
2, 4, 6, 12, 20, 30, 60, 84, 168, 336, 528, 880, 1320, 2640, 5280, 10560, 12480, 24960, 49920, 74880, 104832, 209664, 419328, 838656, 1096704, 2193408, 4386816, 8773632, 14622720, 29245440, 58490880, 116981760, 233963520, 350945280, 701890560, 784465920, 1568931840, 2465464320, 4930928640, 9861857280, 14792785920
(list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Sequence is injective (no duplicate values occur) because A004490 is a subsequence of A025487.
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..3367
FORMULA
a(n) = A181819(A004490(n)).
a(n) = A122111(A342012(n)).
PROG
(PARI)
v004490 = readvec("b004490_to.txt"); \\ Prepared from b-file of A004490 with gawk ' { print $2 } '
A004490(n) = v004490[n];
A181819(n) = factorback(apply(e->prime(e), (factor(n)[, 2])));
A353561(n) = A181819(A004490(n));
CROSSREFS
Cf. A004490, A025487, A122111, A181819, A342012.
Cf. also A353562, A353568.
Sequence in context: A358100 A060798 A134320 * A329227 A294430 A294429
Adjacent sequences: A353558 A353559 A353560 * A353562 A353563 A353564
KEYWORD
nonn
AUTHOR
Antti Karttunen, Apr 29 2022
STATUS
approved

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Last modified November 7 00:13 EST 2024. Contains 377523 sequences.
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