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1, 9, 225, 1225, 3969, 9801, 20449, 38025, 65025, 104329, 159201, 233289, 330625, 455625, 613089, 808201, 1046529, 1334025, 1677025, 2082249, 2556801, 3108169, 3744225, 4473225, 5303809, 6245001, 7306209, 8497225, 9828225, 11309769
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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REFERENCES
| Jolley, Summation of Series, Dover (1961).
Konrad Knopp, Theory and application of infinite series, Dover, p. 269
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LINKS
| Konrad Knopp, Theorie und Anwendung der unendlichen Reihen, Berlin, J. Springer, 1922. (Original german edition of "Theory and Application of Infinite Series")
Index to sequences with linear recurrences with constant coefficients, signature (5,-10,10,-5,1).
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FORMULA
| sum(n=1, inf, 1/a(n))=(Pi^2-8)/16 = 0.1168502750680... [Jolley eq. 247]
G.f. ( -1-4*x-190*x^2-180*x^3-9*x^4 ) / (x-1)^5 . - R. J. Mathar, Oct 03 201
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CROSSREFS
| Sequence in context: A159939 A167038 A074190 * A012054 A067405 A063386
Adjacent sequences: A069072 A069073 A069074 * A069076 A069077 A069078
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KEYWORD
| easy,nonn
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AUTHOR
| Benoit Cloitre (benoit7848c(AT)orange.fr), Apr 05 2002
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