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Search: id:A060633
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| A060633 |
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Surround numbers of an n x 1 rectangle. |
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+0
2
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| 16, 123, 361, 778, 1428, 2371, 3673, 5406, 7648, 10483, 14001, 18298, 23476, 29643, 36913, 45406, 55248, 66571, 79513, 94218, 110836, 129523, 150441, 173758, 199648, 228291, 259873, 294586, 332628, 374203, 419521, 468798, 522256, 580123
(list; graph; listen)
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OFFSET
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1,1
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LINKS
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Harry J. Smith, Table of n, a(n) for n=1,...,1000
E. J. Friedman, Math. Magic
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FORMULA
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a(n) = (n^4+22n^3+105n^2-56n-8)/4
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MAPLE
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for n from 1 to 50 do printf(`%d, `, (n^4+22*n^3+105*n^2-56*n-8)/4) od:
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PROGRAM
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(PARI) { for (n=1, 1000, write("b060633.txt", n, " ", (n^4 + 22*n^3 + 105*n^2 - 56*n - 8)/4); ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Jul 08 2009]
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CROSSREFS
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Cf. A047875.
Sequence in context: A053883 A030508 A006215 this_sequence A125353 A126511 A067442
Adjacent sequences: A060630 A060631 A060632 this_sequence A060634 A060635 A060636
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KEYWORD
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easy,nonn
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AUTHOR
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Jason Earls (zevi_35711(AT)yahoo.com), Apr 15 2001
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EXTENSIONS
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More terms from James A. Sellers (sellersj(AT)math.psu.edu), Apr 16 2001
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