login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A143356 A051731 * A006218. 2
1, 4, 6, 12, 11, 23, 17, 32, 29, 41, 30, 66, 38, 61, 61, 82, 53, 104, 61, 115, 92, 107, 77, 170, 98, 132, 124, 170, 104, 216, 114, 201, 158, 183, 158, 287, 143, 210, 193, 293, 161, 318, 171, 291, 266, 266, 189, 418, 218, 335, 269, 357, 220, 426, 271, 429, 309, 354, 250 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..59.

FORMULA

Inverse Mobius transform (A051731) of A006218. Row sums of triangle A143355.

EXAMPLE

a(4) = 12 = sum of row 4 terms of triangle A143355: (7, + 3 + 1 + 1).

a(4) = 12 = (1, 1, 0, 1) dot (1, 3, 5, 8) = (1 + 3 + 0 + 8), where (1, 1, 0, 1) = row 4 of A051731 and A006218 = (1, 3, 5, 8, 10, 14,...).

CROSSREFS

Cf. A006218, A051731, A143355.

Sequence in context: A189765 A074162 A038040 * A058270 A332934 A058199

Adjacent sequences:  A143353 A143354 A143355 * A143357 A143358 A143359

KEYWORD

nonn

AUTHOR

Gary W. Adamson, Aug 10 2008

EXTENSIONS

Corrected typo in A-number in formula; added more terms - R. J. Mathar, Jan 19 2009

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified May 6 01:03 EDT 2021. Contains 343579 sequences. (Running on oeis4.)