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A221792
Number of n-digit cuban primes.
3
1, 3, 7, 17, 36, 109, 265, 762, 2125, 5964, 17205, 49989, 145047, 424155, 1250298, 3697457, 10985390, 32768938, 98054446, 294239322, 885300000, 2669959359, 8069333311, 24435519147
OFFSET
1,2
FORMULA
a(n) = A113478(n) - A113478(n-1). - Jens Kruse Andersen, Jul 14 2014
CROSSREFS
KEYWORD
nonn,base,more
AUTHOR
Vladimir Pletser, Jan 25 2013
EXTENSIONS
a(19)-a(24) added from A113478 by Andrew Howroyd, Jan 14 2020
STATUS
approved