|
| |
|
|
A066874
|
|
Number of partitions of n into unitary divisors of n.
|
|
0
| |
|
|
1, 2, 2, 2, 2, 8, 2, 2, 2, 11, 2, 12, 2, 14, 14, 2, 2, 17, 2, 17, 18, 20, 2, 20, 2, 23, 2, 22, 2, 742, 2, 2, 26, 29, 26, 27, 2, 32, 30, 29, 2, 1654, 2, 32, 32, 38, 2, 36, 2, 41, 38, 37, 2, 44, 38, 38, 42, 47, 2, 3004, 2, 50, 42, 2, 44, 5257, 2, 47, 50, 5066, 2, 47, 2, 59, 54, 52, 50
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,2
|
|
|
EXAMPLE
| a(12) = 12 because the unitary divisors of 12 are 1, 3, 4 and 12; and the partitions are 12, 4+4+4, 4+4+3+1, 4+4+(4x1), 4+3+3+1+1, 4+3+(5x1), 4+(8x1), 3+3+3+3, 3+3+3+1+1+1, 3+3+(6x1), 3+(9x1) and 12x1.
|
|
|
CROSSREFS
| Cf. A018818.
Sequence in context: A061292 A138068 A054083 * A087577 A168281 A203610
Adjacent sequences: A066871 A066872 A066873 * A066875 A066876 A066877
|
|
|
KEYWORD
| easy,nonn
|
|
|
AUTHOR
| Naohiro Nomoto (n_nomoto(AT)yabumi.com), Jan 26 2002
|
|
|
EXTENSIONS
| More terms from David Wasserman (wasserma(AT)spawar.navy.mil), Nov 21 2002
|
| |
|
|
