A143190 - OEIS

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A143190

a(n) is the smallest natural number we cannot obtain from n, n+1, n+2, n+3 and the operators +, -, *, /, using each number only once.

10, 29, 41, 43, 40, 44, 26, 21, 15, 15, 18, 18, 18, 10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5

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OFFSET

1,1

COMMENTS

This sequence is related to the sequences A071110 (for 5 successive integers) and A060316 (for 6 successive integers) and others sequences to come...

Asymptotically (in fact as soon as n>=15), the sequence tends to 5.

LINKS

Table of n, a(n) for n=1..50.

CROSSREFS

Cf. A071110, A060316, A071107, A060315, A141494, A142153.

Sequence in context: A103423 A102542 A098751 * A009771 A068197 A079273

Adjacent sequences: A143187 A143188 A143189 * A143191 A143192 A143193

KEYWORD

nonn

AUTHOR

Gilles A.Fleury, Oct 18 2008

STATUS

approved