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 A178978 a(n) = A144448(n+1)/8. 2
 0, 2, 5, 1, 14, 20, 1, 35, 44, 2, 65, 77, 10, 104, 119, 5, 152, 170, 7, 209, 230, 28, 275, 299, 4, 350, 377, 5, 434, 464, 55, 527, 560, 22, 629, 665, 26, 740, 779, 91, 860, 902, 35, 989, 1034, 40, 1127, 1175, 136, 1274, 1325, 17 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 COMMENTS Differs from A178971 for indices n > 23. LINKS G. C. Greubel, Table of n, a(n) for n = 0..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 Trisections: a(3*n) = A145911(n); a(3*n+1) = A145910(n); a(3*n+2) = A178977(n). a(n) = 3*a(n-27) - 3*a(n-54) + a(n-81). - G. C. Greubel, Mar 06 2022 MAPLE A061039 := proc(n) numer(1/9-1/n^2) ; end proc: A144448 := proc(n) A061039(1+2*n) ; end proc: A178978 := proc(n) A144448(n+1)/8 ; end proc: seq(A178978(n), n=0..80) ; # R. J. Mathar, Jan 06 2011 MATHEMATICA Table[Numerator[1/9 -1/(2*n+3)^2]/8, {n, 0, 75}] (* G. C. Greubel, Mar 06 2022 *) PROG (Sage) [numerator(1/9 -1/(2*n+3)^2)/8 for n in (0..75)] # G. C. Greubel, Mar 06 2022 CROSSREFS Cf. A061039, A145910, A145911, A178971, A178977, A178978, A144448. Sequence in context: A263776 A145879 A231210 * A101895 A260670 A260665 Adjacent sequences: A178975 A178976 A178977 * A178979 A178980 A178981 KEYWORD nonn,easy,less AUTHOR Paul Curtz, Jan 02 2011 STATUS approved

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Last modified June 16 14:12 EDT 2024. Contains 373430 sequences. (Running on oeis4.)