|
| |
|
|
A165551
|
|
Sum of cube of digits is sum of digits of cube.
|
|
1
| |
|
|
0, 1, 2, 10, 20, 31, 100, 103, 123, 200, 203, 301, 302, 310, 1000, 1003, 1030, 1230, 1302, 1312, 1321, 2000, 2003, 2030, 2312, 3001, 3002, 3010, 3020, 3032, 3100, 3112, 3211, 3213, 3221, 10000, 10003, 10030, 10033, 10232, 10300, 10303, 11223, 12033
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 0,3
|
|
|
LINKS
| Harvey P. Dale, Table of n, a(n) for n = 0..1000
|
|
|
EXAMPLE
| For n=31, n^3=29791, sum of digits of cube is 2+9+7+9+1=28, sum of cube of digits is 3^3+1=27+1=28, thus 31 appears in the sequence.
|
|
|
MATHEMATICA
| Select[Range[0, 13000], Total[IntegerDigits[#^3]]==Total[IntegerDigits[ #]^3]&] (* From Harvey P. Dale, Nov 13 2011 *)
|
|
|
PROG
| (PARI) digsum(n) = local(s=0); while(n, s=s+n%10; n=n\10); return(s) cubdigsum(n) = local(s=0); while(n, s=s+(n%10)^3; n=n\10); return(s) for(n=0, 100000, if(cubdigsum(n)==digsum(n^3), print1(n, ", ") ) )
|
|
|
CROSSREFS
| In context A055012, A007953
Sequence in context: A009342 A038103 A177150 * A139592 A120552 A090220
Adjacent sequences: A165548 A165549 A165550 * A165552 A165553 A165554
|
|
|
KEYWORD
| base,easy,nonn
|
|
|
AUTHOR
| Remy Sigrist (remysigrist(AT)free.fr), Sep 21 2009
|
| |
|
|
