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!)
A173498 Partial sums of A005588. 0
2, 9, 61, 2194, 2592601, 3374954133663, 5695183504482491594510172, 16217557574922386301420519886707289378131172220652, 131504586847961235687181874578063117114329409897566535831366955410641808739121788386036154689297602 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Partial sums of number of free binary rooted trees of height n. The subsequence of primes in this partial sum begins: 2, 61, no more through a(12).

LINKS

Table of n, a(n) for n=1..9.

FORMULA

a(n) = Sum_{i=1..n} A005588(i).

EXAMPLE

a(9) = 2 + 7 + 52 + 2133 + 2590407 + 3374951541062 + 5695183504479116640376509 + 16217557574922386301420514191523784895639577710480 + 131504586847961235687181874578063117114329409897550318273792033024340388219235081096658023517076950.

CROSSREFS

Cf. A005588, A002658, A006894.

Sequence in context: A121870 A268450 A146887 * A113662 A052820 A213528

Adjacent sequences:  A173495 A173496 A173497 * A173499 A173500 A173501

KEYWORD

nonn

AUTHOR

Jonathan Vos Post, Feb 19 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 23 07:41 EDT 2021. Contains 347609 sequences. (Running on oeis4.)