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!)
A080328 Smaller of the two Ulam numbers that sum to the n-th Ulam number. 4
0, 0, 1, 1, 2, 2, 3, 2, 3, 2, 8, 2, 8, 2, 11, 1, 6, 4, 26, 16, 3, 8, 13, 18, 28, 2, 3, 4, 8, 57, 62, 36, 48, 3, 53, 69, 2, 3, 2, 87, 8, 26, 3, 13, 2, 47, 2, 3, 2, 47, 69, 2, 13, 102, 36, 97, 3, 8, 57, 2, 47, 2, 47, 97, 26, 8, 18, 2, 53, 3, 2, 47, 2, 3, 102, 69, 47, 69, 2, 97, 102 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,5

COMMENTS

The first two are zero because the Ulam sequence (A002858) is initialized for those terms. The larger term in the sum is in A080329 and the indices are in A080330 and A080331.

LINKS

T. D. Noe, Table of n, a(n) for n=1..10000

EXAMPLE

The 11th Ulam number (26) is the sum of the 6th Ulam number (8) and the 10th Ulam number (18), so a(11)=8.

CROSSREFS

Cf. A002858, A080329, A080330, A080331.

Sequence in context: A080330 A152872 A072832 * A245555 A031266 A238459

Adjacent sequences:  A080325 A080326 A080327 * A080329 A080330 A080331

KEYWORD

nonn

AUTHOR

Jud McCranie, Feb 15 2003

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 02:05 EST 2019. Contains 329850 sequences. (Running on oeis4.)