A378530 - OEIS

A378530

Numbers which can be written in precisely one way as sum of a subset of their proper divisors and that have exactly one subset of their divisors such that the complement has the same sum.

6, 20, 28, 88, 104, 272, 304, 368, 464, 496, 650, 1184, 1312, 1376, 1504, 1696, 1888, 1952, 3770, 4288, 4544, 4672, 5056, 5312, 5696, 6208, 6464, 6592, 6808, 6848, 6976, 7144, 7232, 8056, 8128, 8925, 10744, 11096, 13192, 13736, 14008, 14552, 14824, 15368, 16768, 17536, 17792, 17816, 19072, 19328, 20096, 20864, 21376, 22144

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OFFSET

1,1

LINKS

Table of n, a(n) for n=1..54.

Index entries for sequences where odd perfect numbers must occur, if they exist at all

CROSSREFS

Intersection of A064771 and A083209.

Positions of 2's in A378604.

Cf. A000396 (subsequence), A378529 (characteristic function).

Sequence in context: A338133 A064771 A006036 * A308710 A376874 A242341

Adjacent sequences: A378527 A378528 A378529 * A378531 A378532 A378533

KEYWORD

nonn

AUTHOR

Antti Karttunen, Dec 01 2024

STATUS

approved