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 A037646 Base 4 digits are, in order, the first n terms of the periodic sequence with initial period 3,0,1. 1
 3, 12, 49, 199, 796, 3185, 12743, 50972, 203889, 815559, 3262236, 13048945, 52195783, 208783132, 835132529, 3340530119, 13362120476, 53448481905, 213793927623, 855175710492, 3420702841969, 13682811367879, 54731245471516 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Vincenzo Librandi, Table of n, a(n) for n = 1..500 Index entries for linear recurrences with constant coefficients, signature (4,0,1,-4). FORMULA G.f.: x*(3+x^2) / ( (x-1)*(4*x-1)*(1+x+x^2) ). - R. J. Mathar, Apr 29 2015 MATHEMATICA With[{c=PadRight[{}, 60, {3, 0, 1}]}, Table[FromDigits[Take[c, n], 4], {n, 30}]] (* Harvey P. Dale, Feb 27 2012 *) CROSSREFS Sequence in context: A344136 A248347 A037758 * A012772 A012864 A045890 Adjacent sequences:  A037643 A037644 A037645 * A037647 A037648 A037649 KEYWORD nonn,base,easy AUTHOR STATUS approved

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Last modified December 9 06:07 EST 2021. Contains 349627 sequences. (Running on oeis4.)