|
Search: id:A154722
|
|
|
| A154722 |
|
Triangle read by rows in which row n lists: n, in the center of the row and the pairs of non-composite numbers that are equidistant to n, as shown below in the example. |
|
+0
13
|
|
| 1, 1, 2, 3, 1, 3, 5, 1, 3, 4, 5, 7, 3, 5, 7, 1, 5, 6, 7, 11, 1, 3, 7, 11, 13, 3, 5, 8, 11, 13, 1, 5, 7, 9, 11, 13, 17, 1, 3, 7, 10, 13, 17, 19
(list; graph; listen)
|
|
|
OFFSET
|
1,3
|
|
|
EXAMPLE
|
Triangle begins:
. . . . . . . . . . . . . . .1
. . . . . . . . . . . . . 1, 2, 3
. . . . . . . . . . . .1, .. 3, .. 5
. . . . . . . . . . 1, .. 3, 4, 5, .. 7
. . . . . . . . ... .. 3, .. 5, .. 7, .. .
. . . . . . . 1, .. .. .. 5, 6, 7, .. .. .,11
. . . . . .1, .. 3, .. .. .. 7, .. .. ..11, ..13
. . . . .. .. 3, .. 5, .. .. 8, .. ..11, ..13, .. .
. . .1, .. .. .. 5, .. 7, .. 9, ..11, ..13, .. .. ..17
. 1, .. 3, .. .. .. 7, .. .,10, .. ..13, .. .. ..17, ..19
|
|
CROSSREFS
|
Cf. A000040, A008578, A154720, A154721, A154723, A154724, A154725, A154726, A154727.
Sequence in context: A030306 A119348 A050375 this_sequence A035517 A099471 A121775
Adjacent sequences: A154719 A154720 A154721 this_sequence A154723 A154724 A154725
|
|
KEYWORD
|
easy,more,nonn,tabf
|
|
AUTHOR
|
Omar E. Pol (info(AT)polprimos.com), Jan 14 2009
|
|
|
Search completed in 0.002 seconds
|
