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A056472
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Triangle read by rows in which row n lists all factorizations of n.
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1
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1, 2, 3, 4, 2, 2, 5, 6, 2, 3, 7, 8, 2, 4, 2, 2, 2, 9, 3, 3, 10, 2, 5, 11, 12, 2, 6, 2, 2, 3, 3, 4
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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COMMENTS
| n comes first, then minimal factorization (12=2.6). Resultant factor is further resolved as much as possible, (2.6=2.2.3). The natural number or initial factors are then incremented, (3.4, 13.)
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EXAMPLE
| E.g. 12=2.6=2.2.3=3.4
1; 2; 3; 4,2,2; 5; 6,2,3; 7; 8,2,4,2,2,2; 9,3,3; 10,2,5; 11; 12,2,6,2,2,3,3,4; ...
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CROSSREFS
| Cf. A076709.
Sequence in context: A182710 A182711 A138136 * A162247 A035578 A107795
Adjacent sequences: A056469 A056470 A056471 * A056473 A056474 A056475
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KEYWORD
| nonn,tabf
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AUTHOR
| Donald S. McDonald (don.mcdonald(AT)paradise.net.nz), Dec 07 2002
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