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 A144448 First bisection of A061039. 3
 0, 16, 40, 8, 112, 160, 8, 280, 352, 16, 520, 616, 80, 832, 952, 40, 1216, 1360, 56, 1672, 1840, 224, 2200, 2392, 32, 2800, 3016, 40, 3472, 3712, 440, 4216, 4480, 176, 5032, 5320, 208, 5920, 6232, 728, 6880, 7216, 280, 7912, 8272, 320, 9016, 9400, 1088, 10192, 10600, 136, 11440, 11872, 152 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS From Paschen spectrum of hydrogen. All numbers are multiples of 8. LINKS G. C. Greubel, Table of n, a(n) for n = 1..5000 Index entries for linear recurrences with constant coefficients, signature (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1). FORMULA a(n) = A061039(2*n+1). From G. C. Greubel, Mar 06 2022: (Start) a(n) = 3*a(n-27) - 3*a(n-54) + a(n-81). a(n) = 8*A178978(n). (End) MATHEMATICA Table[Numerator[1/3^2 - 1/(2*n+1)^2], {n, 100}] (* G. C. Greubel, Mar 06 2022 *) PROG (Sage) [numerator(1/9 -1/(2*n+1)^2) for n in (1..100)] # G. C. Greubel, Mar 06 2022 CROSSREFS Cf. A061039, A178978. Sequence in context: A253152 A305362 A197603 * A070584 A205072 A185798 Adjacent sequences: A144445 A144446 A144447 * A144449 A144450 A144451 KEYWORD nonn AUTHOR Paul Curtz, Oct 06 2008 EXTENSIONS Formula index corrected, extended by R. J. Mathar, Dec 02 2008 STATUS approved

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Last modified April 1 05:25 EDT 2023. Contains 361673 sequences. (Running on oeis4.)