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A037131 a(n) = (nextprime(4^n) - nextprime(2^n))/2. 1
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 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,3
LINKS
FORMULA
a(n) = A037130(n) / 2. - Sean A. Irvine, Dec 09 2020
MATHEMATICA
Table[(NextPrime[4^n]-NextPrime[2^n])/2, {n, 0, 30}] (* Harvey P. Dale, May 26 2011 *)
CROSSREFS
Sequence in context: A171496 A006516 A330532 * A292485 A225417 A026851
KEYWORD
nonn
AUTHOR
EXTENSIONS
More terms from Sean A. Irvine, Dec 09 2020
STATUS
approved

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Last modified March 18 22:34 EDT 2024. Contains 370951 sequences. (Running on oeis4.)