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 A145827 Numbers n such that A145768(n) is a square. 7
 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 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 LINKS Table of n, a(n) for n=1..48. PROG (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 range(1<<20): x ^= i*i t = int(math.sqrt(x)) if x == t*t: print(str(i), end=', ') # Alex Ratushnyak, Mar 27 2013 CROSSREFS A145828 = A145768 intersect A000290 = { A145768(a(n)) }. Sequence in context: A365986 A063189 A004472 * A116025 A344011 A320325 Adjacent sequences: A145824 A145825 A145826 * A145828 A145829 A145830 KEYWORD easy,base,nonn AUTHOR M. F. Hasler, Oct 20 2008 EXTENSIONS More terms from Alex Ratushnyak, Mar 27 2013 STATUS approved

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Last modified July 23 04:43 EDT 2024. Contains 374544 sequences. (Running on oeis4.)