A072812 Take the binary number P = 1.01101010001... which has an 1 in each decimal position that is a prime (e.g. 2,3,5,7...) and convert this number to base 10.

1, 4, 1, 4, 6, 8, 2, 5, 0, 9, 8, 5, 1, 1, 1, 1, 6, 6, 0, 2, 4, 8, 1, 0, 9, 6, 2, 2, 1, 5, 4, 3, 0, 7, 7, 0, 8, 3, 6, 5, 7, 7, 4, 2, 3, 8, 1, 3, 7, 9, 1, 6, 9, 7, 7, 8, 6, 8, 2, 4, 5, 4, 1, 4, 4, 8, 8, 6, 4, 0, 9, 6, 0, 6, 1, 9, 3, 5, 7, 3, 3, 4, 1, 9, 6, 2, 9, 0, 0, 4, 8, 4, 2, 8, 4, 7, 5, 7, 7, 7, 9, 3, 9, 6, 1, 6

Offset

1,2

Links

Table of n, a(n) for n=1..106.

Example

1.414682509851111660248109622154307708366...

Maple

a := 1; for i from 2 to 1000 do if isprime(i) then a := a+10^(-i); end if; end do; b := evalf(a, 100); evalf(convert(b, decimal, binary), 40);

Crossrefs

Essentially the same as A051006, which is the main entry.

Cf. A000040, A010051.

Sequence in context: A193750 A092856 A051006 * A244097 A162956 A131112

Adjacent sequences: A072809 A072810 A072811 * A072813 A072814 A072815

Keyword

base,cons,easy,nonn

Author

Andre Neumann Kauffman (andrekff(AT)hotmail.com), Aug 13 2002

Extensions

More digits from Alois P. Heinz, Jan 28 2017

Status

approved