|
Search: id:A117311
|
|
|
| A117311 |
|
Beginning with sequence A096903, choose only those rows such that when a(n) is in factored form all exponents of a(n) are consecutive starting at 1. |
|
+0
1
|
|
| 2, 6, 12, 18, 30, 60, 90, 150, 180, 300, 450, 210, 360, 540, 600, 1350, 1500, 2250, 420, 630, 1050, 1470, 1260, 2100, 2940, 3150, 4410, 7350, 2310, 2520, 3780, 4200, 5880, 9450, 10500, 13230, 15750, 20580, 30870, 36750, 51450, 4620, 6930, 11550, 16170
(list; graph; listen)
|
|
|
OFFSET
|
1,1
|
|
|
COMMENT
|
Included rows can be mapped to permutation groups; e.g. - (12,18) to C2; (60,90,150) and (180,300,450) to C3; (360,540,600,1350,1500,2250) to S3; and (420,630,1050,1470) to C4.
|
|
EXAMPLE
|
10 is not a member of a(n) since it is not a term in A096903.
24 is not a member of a(n) since 24 = 2^3 * 3^1 and exponents 1 & 3 are not consecutive.
12, 60 and 180 are included since the exponents are (2,1), (2,1,1) & (2,2,1) respectively.
|
|
CROSSREFS
|
Cf. A055932 A084918 A096903.
Sequence in context: A006511 A113274 A036913 this_sequence A125024 A053660 A104969
Adjacent sequences: A117308 A117309 A117310 this_sequence A117312 A117313 A117314
|
|
KEYWORD
|
nonn,tabf
|
|
AUTHOR
|
Alford Arnold (Alford1940(AT)aol.com), Mar 07 2006
|
|
EXTENSIONS
|
More terms from Franklin T. Adams-Watters (FrankTAW(AT)Netscape.net), Nov 20 2006
|
|
|
Search completed in 0.002 seconds
|
