|
| |
|
|
A074147
|
|
(2n-1) odd numbers followed by 2n even numbers.
|
|
13
|
|
|
|
1, 2, 4, 3, 5, 7, 6, 8, 10, 12, 9, 11, 13, 15, 17, 14, 16, 18, 20, 22, 24, 19, 21, 23, 25, 27, 29, 31, 26, 28, 30, 32, 34, 36, 38, 40, 33, 35, 37, 39, 41, 43, 45, 47, 49, 42, 44, 46, 48, 50, 52, 54, 56, 58, 60, 51, 53, 55, 57, 59, 61, 63, 65, 67, 69, 71, 62, 64, 66, 68, 70, 72
(list;
table;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
|
OFFSET
|
1,2
|
|
|
LINKS
|
Ivan Neretin, Table of n, a(n) for n = 1..5050
|
|
|
FORMULA
|
T(n,k) = A061925(n+1)+2k, 0<=k<n. - R. J. Mathar, Jul 17 2007
a(n) = A116941(n-1)+1. - Robert G. Wilson v, Mar 09 2017
|
|
|
EXAMPLE
|
As a triangular array:
1,
2, 4,
3, 5, 7,
6, 8, 10, 12,
9, 11, 13, 15, 17,
14, 16, 18, 20, 22, 24,
...
|
|
|
MATHEMATICA
|
Flatten@Table[Ceiling[(n - 1)^2/2] + 2 k - 1, {n, 12}, {k, n}] (* Ivan Neretin, Dec 15 2016 *)
|
|
|
CROSSREFS
|
Cf. A074148, A074149, A001614.
Sequence in context: A262478 A236348 A143097 * A138607 A166014 A357527
Adjacent sequences: A074144 A074145 A074146 * A074148 A074149 A074150
|
|
|
KEYWORD
|
nonn,tabl
|
|
|
AUTHOR
|
Amarnath Murthy, Aug 28 2002
|
|
|
EXTENSIONS
|
More terms from R. J. Mathar, Jul 17 2007
|
|
|
STATUS
|
approved
|
| |
|
|
