|
| |
|
|
A064617
|
|
(10^n-1)*(80/81)+n/9.
|
|
2
| |
|
|
9, 98, 987, 9876, 98765, 987654, 9876543, 98765432, 987654321, 9876543210, 98765432099, 987654320988, 9876543209877, 98765432098766, 987654320987655, 9876543209876544, 98765432098765433, 987654320987654322
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,1
|
|
|
COMMENTS
| a(n)/10^n converges to 80/81=0.987654320987654320...
9=1*8+1; 98=12*8+2; 987=123*8+3; 9876=1234*8+4; 98765=12345*8+5; 987654=123456*8+6; 9876543=1234567*8+7; 98765432=12345678*8+8; 987654321=123456789*9+9 [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Aug 07 2010]
|
|
|
LINKS
| Harry J. Smith, Table of n, a(n) for n=1,...,150
|
|
|
FORMULA
| a(n) =10*a(n-1)+10-n =(19-n)*A002275(n)-A064616(n) =10*A002275(n)-A014824(n)
|
|
|
PROG
| (PARI) { a=0; for (n=1, 150, a=10*a + 10 - n; write("b064617.txt", n, " ", a) ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Sep 20 2009]
|
|
|
CROSSREFS
| Sequence in context: A085868 A147637 A057933 * A024115 A066557 A121706
Adjacent sequences: A064614 A064615 A064616 * A064618 A064619 A064620
|
|
|
KEYWORD
| base,easy,nonn
|
|
|
AUTHOR
| Henry Bottomley (se16(AT)btinternet.com), Sep 26 2001
|
| |
|
|
