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

 

Logo

Annual Appeal: Please make a donation (tax deductible in USA) to keep the OEIS running. Over 5000 articles have referenced us, often saying "we discovered this result with the help of the OEIS".

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A158907 Row sums of triangle A158906. 2
1, 3, 4, 6, 6, 9, 8, 11, 11, 13, 12, 17, 14, 17, 18, 20, 18, 23, 20, 25, 24, 25, 24, 31, 27, 29, 30, 33, 30, 37, 32, 37, 36, 37, 38, 44, 38, 41, 42, 47, 42, 49, 44, 49, 50, 49, 48, 57, 51, 55, 54, 57, 54, 61, 58, 63, 60, 61, 60 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

a(n) = prime(n) + 1 if n is prime.

LINKS

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

FORMULA

a(n) = sum_{k=1..n} A158906(n,k).

a(n) = A032741(n)+n. - R. J. Mathar, Jan 08 2015

EXAMPLE

a(n) = 6 = (4 + 1 + 0 + 1).

MAPLE

A158906 := proc(n, k)

    add( A158821(n-1, j-1)*A051731(j, k), j=k..n) ;

end proc:

A158907 := proc(n)

    add(A158906(n, k), k=1..n) ;

end proc:

seq(A158907(n), n=1..62) ; # R. J. Mathar, Jan 08 2015

CROSSREFS

Cf. A158906.

Sequence in context: A274529 A162625 A033095 * A175708 A023830 A063649

Adjacent sequences:  A158904 A158905 A158906 * A158908 A158909 A158910

KEYWORD

nonn,easy

AUTHOR

Gary W. Adamson and Mats Granvik, Mar 29 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 | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy .

Last modified December 9 17:46 EST 2016. Contains 278985 sequences.