|
Search: id:A063072
|
|
|
| A063072 |
|
Sum of divisors of Ramanujan's highly composite numbers, or sigma(A002182(n)). |
|
+0
2
|
|
| 1, 3, 7, 12, 28, 60, 91, 124, 168, 360, 546, 744, 1170, 2418, 2880, 4368, 5952, 9360, 19344, 28800, 39312, 59520, 79248, 99944, 112320, 180048, 203112, 232128, 345600, 471744, 714240, 950976, 1199328, 1451520, 2160576, 2437344, 2926080
(list; graph; listen)
|
|
|
OFFSET
|
1,2
|
|
|
LINKS
|
Harry J. Smith, Table of n, a(n) for n=1,...,50
|
|
PROGRAM
|
(PARI) a=0; j=[]; for(n=1, 200000, b=numdiv(n); if(b>a, a=b; j=concat(j, sigma(n)))); j
(PARI) { n=a=0; for (m=1, 10^9, b=numdiv(m); if(b>a, a=b; write("b063072.txt", n++, " ", sigma(m)); if (n==50, break)) ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Aug 16 2009]
|
|
CROSSREFS
|
Cf. A000005, A004394, A002183, A002473, A000203.
Adjacent sequences: A063069 A063070 A063071 this_sequence A063073 A063074 A063075
Sequence in context: A034434 A062325 A099811 this_sequence A007626 A047068 A081533
|
|
KEYWORD
|
easy,nonn
|
|
AUTHOR
|
Jason Earls (zevi_35711(AT)yahoo.com), Aug 02 2001
|
|
EXTENSIONS
|
More terms from Reiner Martin (reinermartin(AT)hotmail.com), Dec 22 2001
|
|
|
Search completed in 0.002 seconds
|
