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

Author

Alford Arnold, Sep 29 2007

Keywords

• easy
• nonn

Examples

			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.

Formula

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

Extensions

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