|
| |
|
|
A131717
|
|
Natural numbers A000027 with 6n+4 and 6n+5 terms swapped.
|
|
1
| |
|
|
1, 2, 3, 5, 4, 6, 7, 8, 9, 11, 10, 12, 13, 14, 15, 17, 16, 18, 19, 20, 21, 23, 22, 24, 25, 26, 27, 29, 28, 30, 31, 32, 33, 35, 34, 36, 37, 38, 39, 41, 40, 42, 43, 44, 45, 47, 46, 48, 49, 50, 51, 53, 52, 54, 55, 56, 57, 59, 58, 60, 61, 62, 63, 65, 64, 66, 67, 68, 69, 71, 70, 72
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,2
|
|
|
COMMENTS
| Hexaperiodic differences: 1, 1, 2, -1, 2, 1 ; 0, 1, -3, 3, -1, 0 (even palindromic signed) ; 1,-4, 6, -4, 1, 0 .
|
|
|
FORMULA
| a(n)=Sum_{k=0..n}{(1/30)*[7*(k mod 6)-13*((k+1) mod 6)+17*((k+2) mod 6)-3*((k+3) mod 6)+2*((k+4) mod 6)+2*((k+5) mod 6)]}, with n>=0 - Paolo P. Lava (paoloplava(AT)gmail.com), Jan 31 2008
|
|
|
CROSSREFS
| Sequence in context: A077664 A179475 A138311 * A084489 A084490 A060119
Adjacent sequences: A131714 A131715 A131716 * A131718 A131719 A131720
|
|
|
KEYWORD
| nonn
|
|
|
AUTHOR
| Paul Curtz (bpcrtz(AT)free.fr), Sep 15 2007
|
| |
|
|
