A221792 - OEIS

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A221792

Number of n-digit cuban primes.

1, 3, 7, 17, 36, 109, 265, 762, 2125, 5964, 17205, 49989, 145047, 424155, 1250298, 3697457, 10985390, 32768938, 98054446, 294239322, 885300000, 2669959359, 8069333311, 24435519147

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OFFSET

1,2

LINKS

Table of n, a(n) for n=1..24.

FORMULA

a(n) = A113478(n) - A113478(n-1). - Jens Kruse Andersen, Jul 14 2014

CROSSREFS

Cf. A002407, A113478, A221793.

Sequence in context: A326520 A295146 A014314 * A354124 A089099 A089116

Adjacent sequences: A221789 A221790 A221791 * A221793 A221794 A221795

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