A133031 Triangle read by rows: row n lists divisors of n-th perfect number A000396(n).

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

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