A109592 - OEIS

%I #5 Mar 31 2012 13:46:52

%S 2,6,14,24,36,52,70,90,112,138,166,196,228,262,300,340,382,426,472,

%T 520,570,624,680,738,798,860,924,990,1058,1130,1204,1280,1358,1438,

%U 1520,1604,1690,1778,1870,1964,2060,2158,2258,2360,2464,2570,2678,2788,2902

%N Sequence and first differences include all even numbers exactly once and no odd numbers.

%C First differences = 2*A030124.

%D E. Angelini, "Jeux de suites", in Dossier Pour La Science, pp. 32-35, Volume 59 (Jeux math'), April/June 2008, Paris.

%F a(n) = 2*A005228(n).

%Y Cf. A005228, A030124.

%K easy,nonn

%O 1,1

%A _Eric Angelini_, Aug 30 2005

%E Edited, corrected and extended by _Ray Chandler_, Sep 06 2005