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A080331 Index in A002858 of the larger of the two Ulam numbers that sum to the n-th Ulam number. +0
4
0, 0, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 13, 15, 15, 17, 13, 17, 20, 20, 20, 20, 20, 25, 26, 27, 28, 20, 20, 27, 25, 33, 27, 28, 36, 37, 38, 27, 40, 38, 42, 42, 44, 40, 46, 47, 48, 42, 40, 51, 52, 38, 53, 44, 56, 56, 54, 59, 55, 61, 56, 53, 61, 65, 65, 67, 61, 69, 70 (list; graph; listen)
OFFSET

1,3

COMMENT

The first two are zero because the Ulam sequence (A002858) is initialized for those terms. The terms of the sum are in A080328 and A080329, and the indices are in A080330 and A080331.

EXAMPLE

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

CROSSREFS

Cf. A002858, A080328, A080329, A080330.

Sequence in context: A070696 A053834 A043273 this_sequence A053835 A072965 A043274

Adjacent sequences: A080328 A080329 A080330 this_sequence A080332 A080333 A080334

KEYWORD

nonn

AUTHOR

Jud McCranie (j.mccranie(AT)comcast.net), Feb 15 2003

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Last modified July 26 13:41 EDT 2008. Contains 142293 sequences.


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