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A003045 a(n) (n>6) is least integer > a(n-1) with precisely three representations a(n) = a(i) + a(j), 1<=i<j<n.
(Formerly M0491)
0
1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 16, 19, 21, 23, 25, 30, 44, 46, 48, 50, 55, 65, 73, 74, 77, 84, 86, 91, 95, 97, 114, 122, 123, 126, 133, 142, 144, 148, 162, 171, 173, 175, 190, 197, 205, 208, 216, 227, 232, 243, 244, 258, 265, 272, 278, 280, 291, 298, 309, 314, 326 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

REFERENCES

R. K. Guy, Unsolved Problems in Number Theory, Section C4.

R. Queneau, Sur les suites s-additives, J. Combin. Theory, A12 (1972), 31-71.

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

LINKS

Table of n, a(n) for n=1..62.

CROSSREFS

Sequence in context: A182419 A033060 A060471 * A029750 A246080 A173925

Adjacent sequences:  A003042 A003043 A003044 * A003046 A003047 A003048

KEYWORD

nonn

AUTHOR

N. J. A. Sloane.

EXTENSIONS

Definition revised by Duncan Moore (duncan.moore(AT)gmx.com), Feb 20 2010

More terms from Jon E. Schoenfield, Mar 26 2010

STATUS

approved

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Last modified November 28 00:22 EST 2014. Contains 250286 sequences.