The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

Thanks to everyone who made a donation during our annual appeal!
To see the list of donors, or make a donation, see the OEIS Foundation home page.

 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

%I

%S 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,

%T 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,

%U 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

%N Smaller of the two Ulam numbers that sum to the n-th Ulam number.

%C 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.

%H T. D. Noe, <a href="/A080328/b080328.txt">Table of n, a(n) for n=1..10000</a>

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

%Y Cf. A002858, A080329, A080330, A080331.

%K nonn

%O 1,5

%A _Jud McCranie_, Feb 15 2003

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.

Last modified January 18 13:55 EST 2020. Contains 331010 sequences. (Running on oeis4.)