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!)
A160940 Row sums of triangle defined in A083809. 1
2, 10, 95, 86, 2063, 26338, 1796701, 37907460, 1121781743, 624173160, 301508365839, 448445587666, 90026771795043, 1998858898554, 406702125332939256247, 78594656763841284, 186966120412500951787 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..17.

EXAMPLE

Fourth row is 5, 11, 23, 47, so a(4) = 86.

PROG

(MAGMA) f:=function(n) m:=1; while not IsPrime(m*n+1) do m+:=1; end while; return m*n+1; end function; [ &+[ k eq 1 select f(j) else f(Self(k-1)): k in [1..j] ]: j in [1..17] ];

CROSSREFS

Cf. A083809, A083810.

Sequence in context: A100622 A103436 A182173 * A193290 A193435 A132572

Adjacent sequences:  A160937 A160938 A160939 * A160941 A160942 A160943

KEYWORD

nonn

AUTHOR

Klaus Brockhaus, May 30 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 February 24 12:13 EST 2020. Contains 332209 sequences. (Running on oeis4.)