|
| |
|
|
A069498
|
|
Triangular numbers of the form 10k.
|
|
0
| |
|
|
0, 10, 120, 190, 210, 300, 630, 780, 820, 990, 1540, 1770, 1830, 2080, 2850, 3160, 3240, 3570, 4560, 4950, 5050, 5460, 6670, 7140, 7260, 7750, 9180, 9730, 9870, 10440, 12090, 12720, 12880, 13530, 15400, 16110, 16290, 17020, 19110, 19900
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 0,2
|
|
|
MAPLE
| a[0] := 0:a[1] := 4:a[2] := 15:a[3] := 19:seq((20*(floor(i/4))+a[i mod 4])*(20*(floor(i/4))+a[i mod 4]+1)/2, i=1..100);
|
|
|
CROSSREFS
| Sequence in context: A024128 A030022 A069673 * A182605 A024127 A005949
Adjacent sequences: A069495 A069496 A069497 * A069499 A069500 A069501
|
|
|
KEYWORD
| nonn
|
|
|
AUTHOR
| Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Mar 30 2002
|
|
|
EXTENSIONS
| Corrected and extended by Harvey P. Dale (hpd1(AT)nyu.edu) and Sascha Kurz (sascha.kurz(AT)uni-bayreuth.de), Mar 31 2002
|
| |
|
|
