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A145827
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Numbers n such that A145768(n) is a square.
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7
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0, 1, 7, 9, 14, 15, 16, 24, 33, 63, 89, 193, 240, 255, 271, 430, 448, 528, 575, 729, 742, 783, 903, 1297, 1776, 2409, 2623, 3494, 4079, 4159, 5439, 8278, 13631, 13737, 16128, 41825, 53007, 64344, 95985, 99015, 100607, 138238, 147734, 198976, 256177, 262079, 262335, 278847
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listen;
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internal format)
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OFFSET
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1,3
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LINKS
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Table of n, a(n) for n=1..48.
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PROG
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(PARI) an=0; for(i=1, 10^5, an=bitxor(an, i^2); issquare(an)&print1(i", "))
(Python)
import math
x = 0
for i in xrange(1<<20):
x ^= i*i
t = int(math.sqrt(x));
if x == t*t:
print str(i)+', ',
# Alex Ratushnyak, Mar 27 2013
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CROSSREFS
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A145828 = A145768 intersect A000290 = { A145768(a(n)) }.
Sequence in context: A160777 A063189 A004472 * A116025 A020939 A073457
Adjacent sequences: A145824 A145825 A145826 * A145828 A145829 A145830
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KEYWORD
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easy,base,nonn
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AUTHOR
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M. F. Hasler, Oct 20 2008
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EXTENSIONS
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Added more terms, Alex Ratushnyak, Mar 27 2013
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STATUS
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approved
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