|
| |
|
|
A089649
|
|
a(1)=1, a(2)=2, a(n) = a(n-1)+a([(n+1)/3]).
|
|
2
| |
|
|
1, 2, 3, 4, 6, 8, 10, 13, 16, 19, 23, 27, 31, 37, 43, 49, 57, 65, 73, 83, 93, 103, 116, 129, 142, 158, 174, 190, 209, 228, 247, 270, 293, 316, 343, 370, 397, 428, 459, 490, 527, 564, 601, 644, 687, 730, 779, 828, 877, 934, 991, 1048, 1113, 1178, 1243, 1316, 1389
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,2
|
|
|
COMMENTS
| Partial sums of the sequence : a(1)=1, a(1), a(1), a(1), a(2), a(2), a(2), a(3), a(3), ... each term repeated 3 times.
|
|
|
PROG
| (PARI) a(n)=if(n<2, 1, a(n-1)+a(floor((n+1)/3)))
|
|
|
CROSSREFS
| Cf. A005704, A089650.
Sequence in context: A025694 A022796 A008748 * A049700 A002984 A109965
Adjacent sequences: A089646 A089647 A089648 * A089650 A089651 A089652
|
|
|
KEYWORD
| nonn
|
|
|
AUTHOR
| DELEHAM Philippe (kolotoko(AT)wanadoo.fr), Jan 02 2004
|
| |
|
|
