|
Search: id:A062854
|
|
| |
|
| 1, 2, 3, 3, 5, 4, 7, 5, 6, 6, 11, 6, 13, 8, 9, 8, 17, 9, 19, 10, 12, 12, 23, 10, 16, 14, 15, 13, 29, 12, 31, 15, 18, 18, 20, 13, 37, 20, 21, 16, 41, 17, 43, 20, 21, 24, 47, 17, 31, 22, 27, 23, 53, 22, 31, 22, 30, 30, 59, 19, 61, 32, 28, 26, 36, 26, 67, 30, 36, 26, 71, 23, 73, 38
(list; graph; listen)
|
|
|
OFFSET
|
1,2
|
|
|
COMMENT
|
For prime p, a(p) = p. - Ralf Stephan (ralf(AT)ark.in-berlin.de), Jun 02 2005
a(n) is the number of times n appears in A033677. - Frank Adams-Watters (FrankTAW(AT)Netscape.net), Nov 18 2005
|
|
LINKS
|
T. D. Noe, Table of n, a(n) for n=1..1000
|
|
EXAMPLE
|
a(4)=3 because there are 9 unique products in the 4 X 4 multiplication table (1 2 3 4 6 8 9 12 16), which is 3 more than the 6 unique products in the 3 X 3 multiplication table (1 2 3 4 6 9).
|
|
CROSSREFS
|
Cf. A027421, A062854, A062855, A062856, A062857, A062859.
Sequence in context: A119674 A064920 A064916 this_sequence A057859 A029579 A106647
Adjacent sequences: A062851 A062852 A062853 this_sequence A062855 A062856 A062857
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Ron Lalonde (ronronronlalonde(AT)hotmail.com), Jun 25 2001
|
|
EXTENSIONS
|
More terms from Ralf Stephan (ralf(AT)ark.in-berlin.de), Jun 02 2005
|
|
|
Search completed in 0.002 seconds
|
