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A109592
Sequence and first differences include all even numbers exactly once and no odd numbers.
0
2, 6, 14, 24, 36, 52, 70, 90, 112, 138, 166, 196, 228, 262, 300, 340, 382, 426, 472, 520, 570, 624, 680, 738, 798, 860, 924, 990, 1058, 1130, 1204, 1280, 1358, 1438, 1520, 1604, 1690, 1778, 1870, 1964, 2060, 2158, 2258, 2360, 2464, 2570, 2678, 2788, 2902
OFFSET
1,1
COMMENTS
First differences = 2*A030124.
REFERENCES
E. Angelini, "Jeux de suites", in Dossier Pour La Science, pp. 32-35, Volume 59 (Jeux math'), April/June 2008, Paris.
FORMULA
a(n) = 2*A005228(n).
CROSSREFS
Sequence in context: A239877 A032386 A074329 * A238410 A256482 A106353
KEYWORD
easy,nonn
AUTHOR
Eric Angelini, Aug 30 2005
EXTENSIONS
Edited, corrected and extended by Ray Chandler, Sep 06 2005
STATUS
approved