A164514 - OEIS

%I #7 Sep 01 2015 14:48:45

%S 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,

%T 30,31,32,33,34,35,37,38,39,40,41,42,43,44,45,46,47,48,50,51,52,53,54,

%U 55,56,57,58,59,60,61,62,63,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79

%N 1 followed by numbers that are not squares.

%C Complement of A000290 for n >= 1.

%C a(n) = A255437(A255527(n)) and A255437(m) < a(n) for m < A255527(n), i.e. record values in A255437.

%F {1} Union A000037.

%F 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.

%o (Haskell)

%o a164514 n = a164514_list !! (n-1)

%o a164514_list = 1 : a000037_list

%o -- _Reinhard Zumkeller_, Mar 23 2015

%o (PARI) is(n)=!issquare(n) || n==1 \\ _Charles R Greathouse IV_, Sep 01 2015

%Y Cf. A000037, A255437, A255527.

%K nonn,less,easy

%O 1,2

%A _Jaroslav Krizek_, Aug 14 2009

%E Edited by _R. J. Mathar_, Aug 21 2009