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!)
A176074 Partial sums of A006343. 0
1, 1, 2, 3, 7, 17, 51, 163, 561, 2004, 7391, 27873, 107050, 417152, 1645339, 6555752, 26348334, 106691779, 434851380, 1782551286, 7344326285, 30397197514, 126324028956, 526911437207, 2205163133586, 9256931835831, 38967696710845 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

Partial sums of Arkons: number of elementary maps with n-1 nodes. The subsequence of primes in the partial sum begins: 2, 3, 7, 17, 163, no more through a(26).

LINKS

Table of n, a(n) for n=0..26.

FORMULA

a(n) = SUM[i=0..n] A006343(i) = SUM[i=0..n].

EXAMPLE

a(7) = 1 + 0 + 1 + 1 + 4 + 10 + 34 + 112 = 163 is prime.

CROSSREFS

Cf. A006343, A000934.

Sequence in context: A173868 A274291 A208987 * A281368 A330726 A059801

Adjacent sequences:  A176071 A176072 A176073 * A176075 A176076 A176077

KEYWORD

easy,nonn

AUTHOR

Jonathan Vos Post, Apr 07 2010

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 September 30 12:21 EDT 2020. Contains 337439 sequences. (Running on oeis4.)