OFFSET

1,2

COMMENTS

These subsets have been called 5-free sequences.

REFERENCES

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

LINKS

Fausto A. C. Cariboni, Table of n, a(n) for n = 1..115

Fausto A. C. Cariboni, Sets that yield a(n) for n = 6..115, Apr 30 2018.

K. O'Bryant, Sets of Natural Numbers with Proscribed Subsets, J. Int. Seq. 18 (2015) # 15.7.7.

Karl C. Rubin, On sequences of integers with no k terms in arithmetic progression, 1973 [Scanned copy, with correspondence]

Z. Shao, F. Deng, M. Liang, and X. Xu, On sets without k-term arithmetic progression, Journal of Computer and System Sciences 78 (2012) 610-618.

S. S. Wagstaff, Jr., On k-free sequences of integers, Math. Comp., 26 (1972), 767-771.

CROSSREFS

KEYWORD

nonn

AUTHOR

EXTENSIONS

a(51) and beyond from Fausto A. C. Cariboni, Apr 30 2018

STATUS

approved