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

 

Logo

Please make a donation to keep the OEIS running. We are now in our 55th year. In the past year we added 12000 new sequences and reached 8000 citations (which often say "discovered thanks to the OEIS"). We need to raise money to hire someone to manage submissions, which would reduce the load on our editors and speed up editing.
Other ways to donate

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A138989 a(n) = Frobenius number for 3 successive primes = F[p(n),p(n+1),p(n+2)]. 11
1, 4, 13, 30, 53, 80, 117, 131, 194, 286, 293, 520, 613, 522, 1310, 858, 1001, 929, 1610, 1418, 1322, 1499, 1421, 2941, 3300, 3533, 3710, 3957, 2065, 2241, 3685, 4595, 3697, 3930, 5956, 12074, 5509, 5874, 14690, 7968, 6084, 6373, 12413, 12740, 6694, 21878 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

For Frobenius numbers for 2 successive primes see A037165

For Frobenius numbers for 3 successive primes see A138989

For Frobenius numbers for 4 successive primes see A138990

For Frobenius numbers for 5 successive primes see A138991

For Frobenius numbers for 6 successive primes see A138992

For Frobenius numbers for 7 successive primes see A138993

For Frobenius numbers for 8 successive primes see A138994

LINKS

Table of n, a(n) for n=1..46.

EXAMPLE

a(3)=13 because 13 is the biggest number k such that equation 5*x_1+7*x_2+11*x_3 = k has no solution for any nonnegative x_i (in other words for every k>13 there exists one or more solutions)

MATHEMATICA

Table[FrobeniusNumber[{Prime[n], Prime[n + 1], Prime[n + 2}], {n, 1, 100}]

FrobeniusNumber/@Partition[Prime[Range[50]], 3, 1] (* Harvey P. Dale, Dec 01 2015 *)

CROSSREFS

Cf. A028387, A037165, A079326, A138985, A138986, A138987, A138988, A138989, A138990, A138991, A138992, A138993.

Sequence in context: A264536 A161742 A041301 * A254830 A071400 A206806

Adjacent sequences:  A138986 A138987 A138988 * A138990 A138991 A138992

KEYWORD

nonn

AUTHOR

Artur Jasinski, Apr 05 2008

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 December 8 17:36 EST 2019. Contains 329865 sequences. (Running on oeis4.)