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A204914
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Ordered differences of squared primes.
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4
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5, 21, 16, 45, 40, 24, 117, 112, 96, 72, 165, 160, 144, 120, 48, 285, 280, 264, 240, 168, 120, 357, 352, 336, 312, 240, 192, 72, 525, 520, 504, 480, 408, 360, 240, 168, 837, 832, 816, 792, 720, 672, 552, 480, 312, 957, 952, 936, 912, 840, 792, 672
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OFFSET
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1,1
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COMMENTS
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For a guide to related sequences, see A204892.
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LINKS
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EXAMPLE
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a(1) = s(2) - s(1) = 9 - 4 = 5;
a(2) = s(3) - s(1) = 25 - 4 = 21;
a(3) = s(3) - s(2) = 25 - 9 = 16;
a(4) = s(4) - s(1) = 49 - 4 = 45.
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MATHEMATICA
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PROG
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(Python)
from math import isqrt
from sympy import prime, primerange
def aupton(terms):
sqps = [p*p for p in primerange(1, prime(isqrt(2*terms)+1)+1)]
return [b-a for i, b in enumerate(sqps) for a in sqps[:i]][:terms]
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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