|
| |
|
|
A101427
|
|
Number of different cuboids with volume (pq)^n, where p,q are distinct prime numbers.
|
|
4
| |
|
|
2, 8, 19, 42, 78, 139, 224, 350, 517, 744, 1032, 1405, 1862, 2432, 3115, 3942, 4914, 6067, 7400, 8954, 10729, 12768, 15072, 17689, 20618, 23912, 27571, 31650, 36150, 41131, 46592, 52598, 59149, 66312, 74088, 82549, 91694, 101600, 112267, 123774
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,1
|
|
|
COMMENTS
| Subsequence of A034836, which gives the number of cuboids for volume n.
|
|
|
FORMULA
| a(n) = A034836(6^n) = A034836((pq)^n) for p,q distinct primes.
|
|
|
CROSSREFS
| Cf. A034836, A101423, A101424, A101425, A101426.
Sequence in context: A193389 A030504 A000158 * A126877 A107769 A026588
Adjacent sequences: A101424 A101425 A101426 * A101428 A101429 A101430
|
|
|
KEYWORD
| nonn
|
|
|
AUTHOR
| Anthony C Robin (anthony_robin(AT)hotmail.com), Jan 17 2005
|
|
|
EXTENSIONS
| Extended by Ray Chandler (rayjchandler(AT)sbcglobal.net), Dec 17 2008
Edited by Ray Chandler (rayjchandler(AT)sbcglobal.net), Dec 19 2008
|
| |
|
|