A164514 - OEIS

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A164514

1 followed by numbers that are not squares.

1, 2, 3, 5, 6, 7, 8, 10, 11, 12, 13, 14, 15, 17, 18, 19, 20, 21, 22, 23, 24, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,2`
	COMMENTS	`Complement of A000290 for n >= 1.` `a(n) = A255437(A255527(n)) and A255437(m) < a(n) for m < A255527(n), i.e. record values in A255437.`
	LINKS	`Table of n, a(n) for n=1..72.`
	FORMULA	`{1} Union A000037.` `a(n) = A000037(n-1) = n-1+floor(1/2 + sqrt(n - 1)) = n-1 + floor( sqrt(n-1 + floor( sqrt(n - 1) ))) for n > 1.`
	PROG	`(Haskell)` `a164514 n = a164514_list !! (n-1)` `a164514_list = 1 : a000037_list` `-- Reinhard Zumkeller, Mar 23 2015` `(PARI) is(n)=!issquare(n) \|\| n==1 \\ Charles R Greathouse IV, Sep 01 2015`
	CROSSREFS	`Cf. A000037, A255437, A255527.` `Sequence in context: A072099 A046841 A244218 * A000037 A028761 A028809` `Adjacent sequences: A164511 A164512 A164513 * A164515 A164516 A164517`
	KEYWORD	`nonn,less,easy`
	AUTHOR	`Jaroslav Krizek, Aug 14 2009`
	EXTENSIONS	`Edited by R. J. Mathar, Aug 21 2009`
	STATUS	`approved`

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Last modified October 2 23:51 EDT 2022. Contains 357230 sequences. (Running on oeis4.)