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A037131
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a(n) = (nextprime(4^n) - nextprime(2^n))/2.
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1
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0, 1, 6, 28, 120, 497, 2016, 8140, 32640, 130813, 523776, 2096133, 8386580, 33550335, 134209524, 536854528, 2147450887, 8589869054, 34359607310, 137438691321, 549755289604, 2199022206975, 8796090925052, 35184367894531, 140737479966709, 562949936644106
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OFFSET
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0,3
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LINKS
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FORMULA
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MATHEMATICA
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Table[(NextPrime[4^n]-NextPrime[2^n])/2, {n, 0, 30}] (* Harvey P. Dale, May 26 2011 *)
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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