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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A318955 Binomial(A319500(n),a(n)) = A006917(n) with 2 <= a(n) <= A319500(n)/2. 2
2, 2, 2, 3, 2, 2, 3, 2, 2, 2, 3, 2, 4, 2, 3, 2, 2, 3, 4, 2, 2, 3, 2, 2, 4, 3, 2, 5, 2, 2, 3, 2, 2, 4, 2, 3, 2, 2, 2, 3, 5, 2, 4, 2, 2, 3, 2, 2, 2, 2, 3, 2, 4, 2, 2, 5, 3, 2, 2, 2, 6, 2, 3, 2, 4, 2, 2, 2, 3, 2, 2, 2, 5, 2, 3, 4, 2, 2, 2, 3, 2, 2, 2, 6, 2, 3, 4, 2, 2, 2, 5, 2, 3, 2, 2, 2, 2, 3, 2 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

First differs from A022912 at n=18.

LINKS

Robert Israel, Table of n, a(n) for n = 1..10000

EXAMPLE

a(3) = 6 because A006987(3) = 15 = binomial(6,2).

MAPLE

N:= 10000: # for binomial(n, k) values <= N

S:= {}:

for n from 2 while n*(n-1)/2 <= N do

  for k from 2 to n/2 do

    v:= binomial(n, k);

    if v > N then break fi;

    if not member(v, S) then

      S:= S union {v};

      K[v]:= k;

    fi

od od:

A006987:= sort(convert(S, list)):

seq(K[A006987[i]], i=1..nops(A006987));

CROSSREFS

Cf. A006987, A022912, A319500.

Sequence in context: A279408 A135592 A022912 * A173883 A022922 A239141

Adjacent sequences:  A318952 A318953 A318954 * A318956 A318957 A318958

KEYWORD

nonn

AUTHOR

Robert Israel, Sep 20 2018

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 April 20 09:59 EDT 2019. Contains 322309 sequences. (Running on oeis4.)