Search: id:A153990
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%I A153990
%S A153990 1,2,5,4,7,8,1,2,5,4,7,8,1,2,5,4,7,8,1,2,5,4,7,8,1,2,5,4,7,8,1,2,5,4,7,
%T A153990 8,1,2,5,4,7,8
%N A153990 Period 6: repeat 1, 2, 5, 4, 7, 8.
%C A153990 Shares digits with other 6-periodic sequences, see the list in A153130.
%C A153990 Also the decimal expansion of the constant 13942/111111 [R. J. Mathar 
               (mathar(AT)strw.leidenuniv.nl), Jan 23 2009]
%C A153990 Terms of the simple continued fraction of 485/(sqrt(4579599)-1807). [From 
               Paolo P. Lava (ppl(AT)spl.at), Feb 17 2009]
%F A153990 a(n)-A141425(n) = A131533(n+2).
%F A153990 a(6n+0)+a(6n+5) = a(6n+1)+a(6n+4) = a(6n+2)+a(6n+3) = 9.
%F A153990 a(n)=(1/15)*{22*(n mod 6)+2*[(n+1) mod 6]-3*[(n+2) mod 6]+7*[(n+3) mod 
               6]-3*[(n+4) mod 6]+2*[(n+5) mod 6]}, with n>=0 [From Paolo P. Lava 
               (ppl(AT)spl.at), Jan 09 2009]
%F A153990 G.f.: (1+2x+5x^2+4x^3+7x^4+8x^5)/((1-x)(1+x)(1+x+x^2)(x^2-x+1)). [R. 
               J. Mathar (mathar(AT)strw.leidenuniv.nl), Jan 23 2009]
%Y A153990 Cf. A154811.
%Y A153990 Sequence in context: A107921 A085801 A023843 this_sequence A154811 A036237 
               A015948
%Y A153990 Adjacent sequences: A153987 A153988 A153989 this_sequence A153991 A153992 
               A153993
%K A153990 nonn,easy
%O A153990 0,2
%A A153990 Paul Curtz (bpcrtz(AT)free.fr), Jan 04 2009
%E A153990 Edited by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jan 23 2009

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