

A007087


Next term is uniquely the sum of 3 earlier terms.
(Formerly M1035)


1



1, 2, 4, 7, 10, 12, 16, 17, 32, 36, 42, 57, 72, 73, 98, 102, 104, 129, 159, 164, 174, 189, 199, 221, 224, 255, 286, 287, 347, 372, 378, 403, 428, 443, 444, 469, 494, 529, 560, 586
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OFFSET

1,2


REFERENCES

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
M. C. Wunderlich, The improbable behavior of Ulam's summation sequence, pp. 249257 of A. O. L. Atkin and B. J. Birch, editors, Computers in Number Theory. Academic Press, NY, 1971.


LINKS

Table of n, a(n) for n=1..40.
R. G. Wilson, V, Letter to N. J. A. Sloane, Sep. 1992


CROSSREFS

Sequence in context: A089972 A276209 A062429 * A101359 A007303 A102988
Adjacent sequences: A007084 A007085 A007086 * A007088 A007089 A007090


KEYWORD

nonn


AUTHOR

N. J. A. Sloane, Robert G. Wilson v


STATUS

approved



