A080328 Smaller of the two Ulam numbers that sum to the n-th Ulam number.

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

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: A152872 A350883 A072832 * A245555 A031266 A238459

Adjacent sequences: A080325 A080326 A080327 * A080329 A080330 A080331

Keyword

nonn

Author

Jud McCranie, Feb 15 2003

Status

approved