| 0, 6, 10, 28, 36, 66, 78, 120, 136, 190, 210, 276, 300, 378, 406, 496, 528, 630, 666, 780, 820, 946, 990, 1128, 1176, 1326, 1378, 1540, 1596, 1770, 1830, 2016, 2080, 2278, 2346, 2556, 2628, 2850, 2926, 3160, 3240, 3486, 3570, 3828, 3916, 4186, 4278, 4560
(list; graph; listen)
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OFFSET
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0,2
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COMMENT
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a(n) = A000217(A014601(n)). - Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Oct 04 2004
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FORMULA
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Even numbers of the form n(n+1)/2.
a(n) = 2*ceiling[n/2]*(2n+1) = A056575(n)-(2n+1)*(-1)^n.
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MATHEMATICA
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Table[2Ceiling[n/2]*(2n + 1), {n, 0, 47}] (from Robert G. Wilson v Nov 05 2004)
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CROSSREFS
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Cf. A000217, A014493, A056575.
Adjacent sequences: A014491 A014492 A014493 this_sequence A014495 A014496 A014497
Sequence in context: A073249 A077621 A081394 this_sequence A129545 A097578 A103767
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KEYWORD
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nonn,easy
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AUTHOR
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Mohammad K. Azarian (ma3(AT)evansville.edu)
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EXTENSIONS
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More terms from Erich Friedman (erich.friedman(AT)stetson.edu).
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