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A115176 Positive numbers that are not the sum of two squares and a positive Fibonacci number. 8
256, 384, 872, 1224, 1512, 1728, 2661, 2675, 2824, 3528, 4656, 5150, 5224, 6016, 6024, 6336, 6592, 6840, 7193, 7528, 7560, 7664, 8016, 8456, 8512, 8952, 8968, 9072, 9696, 9796, 10032, 10300, 10440, 10624, 11000, 11184, 11208, 11256, 11640, 11880 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

There are 2142682 such numbers up to 10^9, the last one in this range being 999999456.

LINKS

Table of n, a(n) for n=1..40.

PROG

(PARI) isA001481(n)=#bnfisintnorm(bnfinit(z^2+1), n)

is(n)=my(k=1, f); while((f=fibonacci(k++))<=n, if(isA001481(n-f), return(0))); 1 \\ Charles R Greathouse IV, Mar 11 2016

CROSSREFS

Cf. A115171, A115172, A115173, A115174, A115175, A115177.

Sequence in context: A036332 A114987 A046310 * A299156 A221259 A223693

Adjacent sequences:  A115173 A115174 A115175 * A115177 A115178 A115179

KEYWORD

nonn

AUTHOR

Giovanni Resta, Jan 15 2006

STATUS

approved

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Last modified June 26 10:12 EDT 2019. Contains 324375 sequences. (Running on oeis4.)