A079328 Let f(n)=A001359(n) be the smaller member of the n-th pair of twin primes. Then a(n) is the average of f(n) and f(n+1).

4, 8, 14, 23, 35, 50, 65, 86, 104, 122, 143, 164, 185, 194, 212, 233, 254, 275, 296, 329, 383, 425, 446, 491, 545, 584, 608, 629, 650, 734, 815, 824, 842, 869, 950, 1025, 1040, 1055, 1076, 1121, 1190, 1253, 1283, 1295, 1310, 1373, 1439, 1466, 1484, 1547, 1613

Offset

1,1

Comments

Average of two consecutive lesser of twin primes. - Juri-Stepan Gerasimov, Aug 26 2011.

Links

Table of n, a(n) for n=1..51.

Eric Weisstein's World of Mathematics, Twin Primes

Mathematica

s=Select[Range[2000], PrimeQ[ # ]&&PrimeQ[ #+2]&]; (Drop[s, 1]+Drop[s, -1])/2

Crossrefs

Cf. A001359, A079329.

Sequence in context: A049628 A063757 A193711 * A073612 A227621 A060064

Adjacent sequences: A079325 A079326 A079327 * A079329 A079330 A079331

Keyword

nonn

Author

Vincenzo Origlio (vincenzo.origlio(AT)itc.cnr.it), Feb 13 2003

Extensions

Edited by Dean Hickerson, Feb 14 2003

Status

approved