A101888 - OEIS

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A101888

Smallest natural number sequence without any length 5 equidistant arithmetic subsequences.

1, 2, 3, 4, 6, 7, 8, 9, 11, 12, 13, 14, 16, 17, 18, 19, 22, 23, 24, 25, 27, 28, 29, 30, 32, 33, 34, 35, 37, 38, 39, 40, 43, 44, 45, 46, 48, 49, 50, 51, 53, 54, 55, 56, 58, 59, 60, 61, 64, 65, 66, 67, 69, 70, 71, 72, 74, 75, 76, 77, 79, 80, 81, 82, 86, 87, 88, 90, 91, 92, 93, 95

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

LINKS

Table of n, a(n) for n=1..72.

EXAMPLE

5 is out because of 1,2,3,4,5. 21 is out because of 1,6,11,16,21.

CROSSREFS

Cf. A101889, A101884, A101886.

A selection of sequences related to "no three-term arithmetic progression": A003002, A003003, A003278, A004793, A005047, A005487, A033157, A065825, A092482, A093678, A093679, A093680, A093681, A093682, A094870, A101884, A101886, A101888, A140577, A185256, A208746, A229037.

Sequence in context: A023721 A087066 A120518 * A190241 A225859 A020655

Adjacent sequences: A101885 A101886 A101887 * A101889 A101890 A101891

KEYWORD

nonn

AUTHOR

Douglas Stones (dssto1(AT)student.monash.edu.au), Dec 20 2004

STATUS

approved