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 A173035 Cat years in human years: a(0) = 0, a(1) = 15, a(2) = 24, a(n) = a(n-1) + 4 for n >= 3. 1
 0, 15, 24, 28, 32, 36, 40, 44, 48, 52, 56, 60, 64, 68, 72, 76, 80, 84, 88, 92, 96, 100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140, 144, 148, 152, 156, 160, 164, 168, 172, 176, 180, 184, 188, 192, 196, 200, 204, 208, 212, 216, 220, 224, 228, 232, 236, 240 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 LINKS G. C. Greubel, Table of n, a(n) for n = 0..1000 Franny Syufy, Cats Age Conversion Chart Franny Syufy, How To Convert Cat's Age to Human Years Franny Syufy, How To Convert Cat's Age to Human Years Index entries for linear recurrences with constant coefficients, signature (2,-1). FORMULA From G. C. Greubel, Feb 20 2021: (Start) a(n) = 4*(n+4) -16*[n=0] -5*[n=1]. G.f.: x*(15 -6*x -5*x^2)/(1-x)^2. E.g.f.: 4*(4+x)*exp(x) -16 - 5*x. (End) MAPLE 0, 15, seq(4*(n+4), n=2..60); # G. C. Greubel, Feb 20 2021 MATHEMATICA Join[{0, 15}, NestList[#+4&, 24, 60]] (* Harvey P. Dale, Nov 24 2013 *) PROG (Sage) [0, 15]+[4*(n+4) for n in (2..60)] # G. C. Greubel, Feb 20 2021 (Magma) [0, 15] cat [4*(n+4): n in [2..60]]; // G. C. Greubel, Feb 20 2021 CROSSREFS Sequence in context: A114436 A114558 A035408 * A242152 A269314 A269316 Adjacent sequences:  A173032 A173033 A173034 * A173036 A173037 A173038 KEYWORD nonn,easy AUTHOR Grace Wang (grace_c_wang(AT)yahoo.com), Feb 07 2010 EXTENSIONS Links provided by M. F. Hasler, Feb 09 2010 STATUS approved

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Last modified July 31 02:33 EDT 2021. Contains 346367 sequences. (Running on oeis4.)