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A156551 Period 10: repeat [8,6,0,4,2,2,4,0,6,8]. 1
8, 6, 0, 4, 2, 2, 4, 0, 6, 8, 8, 6, 0, 4, 2, 2, 4, 0, 6, 8, 8, 6, 0, 4, 2, 2, 4, 0, 6, 8, 8, 6, 0, 4, 2, 2, 4, 0, 6, 8, 8, 6, 0, 4, 2, 2, 4, 0, 6, 8, 8, 6, 0, 4, 2, 2, 4, 0, 6, 8, 8, 6, 0, 4, 2, 2, 4, 0, 6, 8, 8, 6, 0, 4, 2, 2, 4, 0, 6, 8, 8, 6, 0, 4, 2, 2, 4, 0, 6, 8 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

COMMENTS

See A131715.

LINKS

Table of n, a(n) for n=0..89.

FORMULA

a(n) = A155110(n) mod 10.

G.f.: 2*(4*x^8-x^7+x^6+x^5+x^3+x^2-x+4)/((1-x)*(x^4-x^3+x^2-x+1)*(x^4+x^3+x^2+x+1)). - R. J. Mathar, Feb 23 2009

a(n) = (1/45)*{4*(n mod 10) - 5*[(n+1) mod 10] - 23*[(n+2) mod 10] + 22*[(n+3) mod 10] - 5*[(n+4) mod 10] + 4*[(n+5) mod 10] + 13*[(n+6) mod 10] - 14*[(n+7) mod 10] + 31*[(n+8) mod 10] + 13*[(n+9) mod 10]}, with n >= 0. - Paolo P. Lava, Feb 13 2009

a(n) = (15*(4-m^4+8*m^3-19*m^2+12*m)-2*(m^3-6*m^2+17*m-18)*(-1)^floor(n/5))/12 where m = n-5*floor(n/5). - Luce ETIENNE, Oct 13 2017

CROSSREFS

Cf. A010874, A131715, A155110.

Sequence in context: A199473 A153617 A069855 * A074738 A344041 A240805

Adjacent sequences:  A156548 A156549 A156550 * A156552 A156553 A156554

KEYWORD

nonn,easy,less

AUTHOR

Paul Curtz, Feb 09 2009

EXTENSIONS

Edited by R. J. Mathar, Feb 23 2009

More terms from Jinyuan Wang, Feb 26 2020

STATUS

approved

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Last modified May 16 22:18 EDT 2021. Contains 343957 sequences. (Running on oeis4.)