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

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