|
Search: id:A116551
|
|
|
| A116551 |
|
Permutation of natural numbers generated by 3-rowed array shown below. |
|
+0
1
|
|
| 0, 3, 1, 6, 4, 2, 9, 7, 5, 12, 10, 8, 15, 13, 11, 18, 16, 14, 21, 19, 17, 24, 22, 20, 27, 25, 23, 30, 28, 26, 33, 31, 29, 36, 34, 32, 39, 37, 35, 42, 40, 38, 45, 43, 41, 48, 46, 44, 51, 49, 47, 54, 52, 50, 57, 55, 53, 60, 58, 56, 63, 61, 59, 66, 64, 62, 69, 67, 65, 72, 70, 68, 75
(list; graph; listen)
|
|
|
OFFSET
|
1,2
|
|
|
COMMENT
|
0 3 6 9 12 15 18 21 24 ... a(n)= 3n
1 4 7 10 13 16 19 22 25 ... a(n)= 3n+1
2 5 8 11 14 17 20 23 26 ... a(n)= 3n+2
|
|
REFERENCES
|
M. Cerasoli, F. Eugeni and M. Protasi, Elementi di Matematica Discreta, Bologna 1988
Emanuele Munarini and Norma Zagaglia Salvi, Matematica Discreta,UTET, CittaStudiEdizioni, Milano 1997
|
|
FORMULA
|
Starting at the term a(3), a(n+3k) = a(n) + 3k, with k>=1.
|
|
CROSSREFS
|
Cf. A115302.
Sequence in context: A131415 A121437 A078585 this_sequence A021320 A066840 A127754
Adjacent sequences: A116548 A116549 A116550 this_sequence A116552 A116553 A116554
|
|
KEYWORD
|
easy,nonn
|
|
AUTHOR
|
Giovanni Teofilatto (g.teofilatto(AT)tiscalinet.it), Mar 17 2006
|
|
|
Search completed in 0.002 seconds
|
