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A037765
Base 4 digits are, in order, the first n terms of the periodic sequence with initial period 3,0,2,1.
0
3, 12, 50, 201, 807, 3228, 12914, 51657, 206631, 826524, 3306098, 13224393, 52897575, 211590300, 846361202, 3385444809, 13541779239, 54167116956, 216668467826, 866673871305, 3466695485223, 13866781940892, 55467127763570
OFFSET
1,1
FORMULA
G.f.: x*(3+2*x^2+x^3) / ( (x-1)*(4*x-1)*(1+x)*(x^2+1) ). - R. J. Mathar, May 02 2015
a(n) = 4*a(n-1) + a(n-4) - 4*a(n-5). - Wesley Ivan Hurt, Apr 25 2023
MATHEMATICA
Table[FromDigits[PadRight[{}, n, {3, 0, 2, 1}], 4], {n, 30}] (* Harvey P. Dale, May 09 2018 *)
CROSSREFS
Sequence in context: A034541 A180879 A180283 * A037653 A229665 A092443
KEYWORD
nonn,base,easy
STATUS
approved