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A106058
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4th diagonal of triangle in A059317.
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1
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0, 0, 0, 2, 9, 22, 42, 70, 107, 154, 212, 282, 365, 462, 574, 702, 847, 1010, 1192, 1394, 1617, 1862, 2130, 2422, 2739, 3082, 3452, 3850, 4277, 4734, 5222, 5742, 6295, 6882, 7504, 8162, 8857, 9590, 10362, 11174, 12027, 12922, 13860, 14842, 15869, 16942, 18062
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,4
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LINKS
| W. F. Klostermeyer, M. E. Mays, L. Soltes and G. Trapp, A Pascal rhombus, Fibonacci Quarterly, 35 (1997), 318-328.
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FORMULA
| For n>1, a(n) = (1/6) (n-2)(n^2 + 8n - 21).
a(n)= 4*a(n-1) -6*a(n-2) +4*a(n-3) -a(n-4). G.f.: -x^3*(-2-x+2*x^2)/(x-1)^4. [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Feb 06 2010]
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CROSSREFS
| Sequence in context: A192971 A024850 A056105 * A086718 A023625 A166754
Adjacent sequences: A106055 A106056 A106057 * A106059 A106060 A106061
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), May 28 2005
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