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A061804
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2*n*(2*n^2 + 1).
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4
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0, 6, 36, 114, 264, 510, 876, 1386, 2064, 2934, 4020, 5346, 6936, 8814, 11004, 13530, 16416, 19686, 23364, 27474, 32040, 37086, 42636, 48714, 55344, 62550, 70356, 78786, 87864, 97614, 108060, 119226, 131136, 143814, 157284, 171570, 186696
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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COMMENTS
| Sum of n-th row of triangle of even numbers: (2, 4), (6, 8, 10, 12), (14, 16, 18, 20, 22, 24), (26, 28, 30, 32, 34, 36, 38, 40), ..., where n-th row contains 2n terms.
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LINKS
| Harry J. Smith, Table of n, a(n) for n=0,...,1000
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EXAMPLE
| a(3) = 114 = 14 + 16 +18 + 20 + 22 + 24.
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MATHEMATICA
| Table[2*n*(2*n^2 + 1), {n, 0, 5!}] (*From Vladimir Joseph Stephan Orlovsky (4vladimir(AT)gmail.com), 04 Dec 2010*)
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PROG
| (PARI) { for (n=0, 1000, write("b061804.txt", n, " ", 2*n*(2*n^2 + 1)) ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Jul 28 2009]
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CROSSREFS
| a(n) = 6 times A005900.
Sequence in context: A036141 A199243 A172137 * A083374 A061707 A056375
Adjacent sequences: A061801 A061802 A061803 * A061805 A061806 A061807
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KEYWORD
| nonn,easy
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AUTHOR
| Amarnath Murthy (amarnath_murthy(AT)yahoo.com), May 28 2001
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EXTENSIONS
| More terms from Larry Reeves (larryr(AT)acm.org) and Alford Arnold (Alford1940(AT)aol.com), May 29 2001. Better description from Dean Hickerson, Jun 05, 2001.
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