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A098765
a(n) = least k such that (k*P(n)#)^2 + 1 ((k+1)*P(n)#)^2 + 1 and ((k+2)*P(n)#)^2 + 1 are 3 primes with P(i) = i-th prime, P(i)# = i-th primorial.
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1, 34, 3, 252, 16, 104, 246, 562, 895, 459, 3656, 165, 409, 869, 3075, 1568, 1310, 7723, 4035, 21114, 10634, 2185, 143, 11861, 24850, 3168, 4750, 14373, 565, 22576, 7971, 2063, 17528, 58449
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Maintained by
N. J. A. Sloane
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njas@research.att.com
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Last modified December 18 21:37 EST 2009. Contains 171024 sequences.
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