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A060633
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Surround numbers of an n x 1 rectangle.
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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; refs; listen; history; internal format)
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OFFSET
| 1,1
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LINKS
| Harry J. Smith, Table of n, a(n) for n=1,...,1000
E. J. Friedman, Math. Magic
Index to sequences with linear recurrences with constant coefficients, signature (5,-10,10,-5,1).
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FORMULA
| a(n) = (n^4+22n^3+105n^2-56n-8)/4.
G.f. x*(-16-43*x+94*x^2-43*x^3+2*x^4) / (x-1)^5 . - R. J. Mathar, Jan 30 2011
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MAPLE
| 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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PROG
| (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
| Cf. A047875.
Sequence in context: A191484 A030508 A006215 * A125353 A126511 A067442
Adjacent sequences: A060630 A060631 A060632 * A060634 A060635 A060636
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KEYWORD
| easy,nonn
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AUTHOR
| Jason Earls (zevi_35711(AT)yahoo.com), Apr 15 2001
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EXTENSIONS
| More terms from James A. Sellers (sellersj(AT)math.psu.edu), Apr 16 2001
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