A133928 Associate each least prime signature value with the corresponding prime number.

1, 2, 5, 11, 17, 31, 47, 83, 109, 127, 149, 211, 277, 307, 353, 499, 653, 709, 823, 1063, 1153, 1289, 1319, 1499, 1613, 1873, 2417, 2647, 2897, 3001, 3407, 3659, 4201, 5441, 5843, 6469, 6691, 6991, 7559, 8147, 8669, 9293, 10267, 10613, 12007, 12899, 14321

Offset

1,2

Links

Table of n, a(n) for n=1..47.

Formula

a(n) = A000040[A025487(n-1)-1], n>1. - R. J. Mathar, Oct 09 2007

Example

Let a(1) = 1 then note
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 ... A000027
1 2 3 4 4 6 5 8 9 8 6 12 7 6 12 16 8 ... A064553
a(n) is formed by choosing the least prime signatures in row two which map to primes in row one yielding 1 2 5 11 17 ... since A025487 = 1 2 4 6 8 ...

Crossrefs

Cf. A000040, A025487, A064553, A064555.

Sequence in context: A336376 A059987 A027426 * A372197 A126204 A091936

Adjacent sequences: A133925 A133926 A133927 * A133929 A133930 A133931

Keyword

easy,nonn

Author

Alford Arnold, Sep 29 2007

Extensions

More terms from R. J. Mathar, Oct 09 2007

Status

approved