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A133031 Triangle read by rows: row n lists divisors of n-th perfect number A000396(n). 6
1, 2, 3, 6, 1, 2, 4, 7, 14, 28, 1, 2, 4, 8, 16, 31, 62, 124, 248, 496, 1, 2, 4, 8, 16, 32, 64, 127, 254, 508, 1016, 2032, 4064, 8128, 1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096, 8191, 16382, 32764, 65528, 131056, 262112, 524224, 1048448, 2096896 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..56.

Omar E. Pol, Determinacion geometrica de los numeros primos y perfectos.

CROSSREFS

Cf. A018254, A018487, A027750. Perfect numbers: A000396.

Sequence in context: A268603 A226871 A178483 * A275732 A200594 A319191

Adjacent sequences:  A133028 A133029 A133030 * A133032 A133033 A133034

KEYWORD

nonn,tabf

AUTHOR

Omar E. Pol, Oct 26 2007

STATUS

approved

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Last modified October 18 12:18 EDT 2019. Contains 328160 sequences. (Running on oeis4.)