|
Search: id:A065447
|
|
|
| A065447 |
|
Concatenation of increasing number of alternating digits, starting with 1. |
|
+0
4
|
| |
|
|
OFFSET
|
1,2
|
|
|
LINKS
|
Harry J. Smith, Table of n, a(n) for n=1,...,44
|
|
PROGRAM
|
(PARI) { m=10; for (n=1, 44, if (n==1, a=1, m*=10; a*=m; if (n%2, a+=(m - 1)/9)); write("b065447.txt", n, " ", a) ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Oct 19 2009]
|
|
CROSSREFS
|
For decimal version see A065760. Cf. A065761.
Sequence in context: A163663 A151648 A013747 this_sequence A036507 A139110 A013855
Adjacent sequences: A065444 A065445 A065446 this_sequence A065448 A065449 A065450
|
|
KEYWORD
|
base,easy,nonn
|
|
AUTHOR
|
Lior Manor (lior.manor(AT)gmail.com) Nov 18 2001
|
|
|
Search completed in 0.002 seconds
|
