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A106576
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Period 20. Sequence gives last digit of A106157, starting from the first positive term.
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0
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1, 2, 1, 2, 3, 6, 3, 6, 5, 0, 5, 0, 7, 4, 7, 4, 9, 8, 9, 8, 1, 2, 1, 2, 3, 6, 3, 6, 5, 0, 5, 0, 7, 4, 7, 4, 9, 8, 9, 8, 1, 2, 1, 2, 3, 6, 3, 6, 5, 0, 5, 0, 7, 4, 7, 4, 9, 8, 9, 8, 1, 2, 1, 2, 3, 6, 3, 6, 5, 0, 5, 0, 7, 4, 7, 4, 9, 8, 9, 8, 1, 2, 1, 2, 3, 6, 3, 6, 5, 0, 5, 0, 7, 4, 7, 4, 9, 8, 9, 8, 1, 2, 1, 2, 3
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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FORMULA
| G.f. A/B with A = (1+2*x+3*x^4+4*x^13+5*x^8+6*x^5+7*x^12+8*x^17+9*x^16) and B = (1-x)*(x+1)*(x^4-x^3+x^2-x+1)*(x^4+x^3+x^2+x+1)*(x^8-x^6+x^4-x^2+1)
a(n)=(1/190)*{71*(n mod 20)+14*[(n+1) mod 20]-5*[(n+2) mod 20]+14*[(n+3) mod 20]-43*[(n+4) mod 20]+33*[(n+5) mod 20]-24*[(n+6) mod 20]+33*[(n+7) mod 20]-62*[(n+8) mod 20]+52*[(n+9) mod 20]-43*[(n+10) mod 20]+52*[(n+11) mod 20]+14*[(n+12) mod 20]-24*[(n+13) mod 20]+33*[(n+14) mod 20]-24*[(n+15) mod 20]-5*[(n+16) mod 20]-5*[(n+17) mod 20]+14*[(n+18) mod 20]-5*[(n+19) mod 20]}, with n>=0 [From Paolo P. Lava (paoloplava(AT)gmail.com), Oct 23 2008]
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CROSSREFS
| Sequence in context: A156693 A156564 A198123 * A128474 A108618 A097719
Adjacent sequences: A106573 A106574 A106575 * A106577 A106578 A106579
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KEYWORD
| easy,nonn
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AUTHOR
| Creighton Dement (creighton.k.dement(AT)uni-oldenburg.de), May 09 2005
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