A072805 Primes of form 4k+3 written in base 3.

10, 21, 102, 201, 212, 1011, 1121, 1202, 2012, 2111, 2122, 2221, 10002, 10211, 10222, 11201, 11212, 12011, 12121, 20001, 20012, 20122, 21002, 21101, 21211, 22021, 22102, 22212, 100022, 100202, 101001, 101111, 102101, 102112, 110021

Offset

1,1

Links

Table of n, a(n) for n=1..35.

Example

83 ~ 10002 in base 3.

Mathematica

Do[s=Prime[n]; If[Mod[s, 4]==3, Print[BaseForm[s, 3]]], {n, 1, 256}]

Crossrefs

Cf. A008713, A072803-A072807.

Sequence in context: A321722 A306208 A001739 * A119033 A171067 A121807

Adjacent sequences: A072802 A072803 A072804 * A072806 A072807 A072808

Keyword

base,nonn

Author

Labos Elemer, Jul 12 2002

Status

approved