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A049781 a(n)=(b(n)+1)/2, where b=A000959 (the lucky numbers). 0
1, 2, 4, 5, 7, 8, 11, 13, 16, 17, 19, 22, 25, 26, 32, 34, 35, 37, 38, 40, 44, 47, 50, 53, 56, 58, 64, 65, 67, 68, 71, 76, 80, 82, 85, 86, 95, 97, 98, 101, 103, 106, 110, 112, 116, 118, 119, 121, 130, 131, 134, 137, 142, 143, 145, 149, 152 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

REFERENCES

R. K. Guy, Unsolved Problems in Number Theory, C3.

LINKS

Table of n, a(n) for n=1..57.

CROSSREFS

Sequence in context: A191324 A147807 A022559 * A076697 A001606 A014554

Adjacent sequences:  A049778 A049779 A049780 * A049782 A049783 A049784

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified July 23 11:44 EDT 2019. Contains 325254 sequences. (Running on oeis4.)