A083506 n-th row of the following triangle contains all distinct numbers that can be obtained as the product of two distinct numbers chosen from 1 to n. (n>1). Sequence contains the triangle read by rows.

2, 2, 3, 6, 2, 3, 4, 6, 8, 12, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 2, 3, 4, 5, 6, 8, 10, 12, 15, 18, 20, 24, 30, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 18, 20, 21, 24, 28, 30, 35, 42, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 18, 20, 21, 24, 28, 30, 32, 35, 40, 42, 48, 56, 2, 3, 4, 5, 6, 7, 8, 9

Offset

2,1

References

Amarnath Murthy, Generalization of partition function introducing Smarandache Factor Partitions, Smarandache Notions Journal, 1-2-3, Vol. 11, 2000.

Links

Table of n, a(n) for n=2..85.

Example

2
2,3,6
2,3,4,6,8,12
2,3,4,5,6,8,10,12,15,20
2,3,4,5,6,8,10,12,15,16,18,20,24,30
2,3,4,5,6,7,8,10,12,...
...

Crossrefs

A027428 gives the row lengths.

Sequence in context: A002163 A093422 A297890 * A248164 A338993 A210222

Adjacent sequences: A083503 A083504 A083505 * A083507 A083508 A083509

Keyword

nonn,tabf

Author

Amarnath Murthy and Meenakshi Srikanth (menakan_s(AT)yahoo.com), May 05 2003

Extensions

More terms from David Wasserman, Nov 18 2004

Status

approved