login
This site is supported by donations to The OEIS Foundation.
Logo

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A094115 Partial sums of A093347. 0
0, 1, 1, 4, 6, 9, 9, 10, 10, 19, 27, 36, 42, 49, 55, 64, 72, 81, 81, 82, 82, 85, 87, 90, 90, 91, 91, 118, 144, 171, 195, 220, 244, 271, 297, 324, 342, 361, 379, 400, 420, 441, 459, 478, 496, 523, 549, 576, 600, 625, 649, 676, 702, 729, 729, 730, 730, 733, 735, 738, 738 (list; graph; refs; listen; history; internal format)
OFFSET

1,4

FORMULA

a(3^k)=(9^k-1)/8

PROG

(PARI) a(n)=sum(k=1, n, -sum(i=1, k-1, (-1)^i*3^valuation(i, 3)))

CROSSREFS

Sequence in context: A084335 A197575 A201660 * A163297 A051679 A010378

Adjacent sequences:  A094112 A094113 A094114 * A094116 A094117 A094118

KEYWORD

nonn

AUTHOR

Benoit Cloitre (benoit7848c(AT)orange.fr), May 03 2004

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
Recent Additions | More pages | Superseeker | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .

Last modified February 15 12:59 EST 2012. Contains 205788 sequences.