1,3

Table of n, a(n) for n=1..78.

a(n)=A071538(A000040(n)). [From R. J. Mathar, Oct 06 2008]

n p D a(n) (p=prime(n), D = prime(n+1)-prime(n))

1 2 1 0

2 3 2 1

3 5 2 2

4 7 4 2

5 11 2 3

6 13 4 3

Cf. A000040, A001223.

Sequence in context: A321578 A055086 A001462 * A276581 A005041 A030530

Adjacent sequences: A082459 A082460 A082461 * A082463 A082464 A082465

nonn

Artemario Tadeu Medeiros da Silva (artemario(AT)uol.com.br), Apr 26 2003

approved