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A021511 Decimal expansion of 1/507. 0
0, 0, 1, 9, 7, 2, 3, 8, 6, 5, 8, 7, 7, 7, 1, 2, 0, 3, 1, 5, 5, 8, 1, 8, 5, 4, 0, 4, 3, 3, 9, 2, 5, 0, 4, 9, 3, 0, 9, 6, 6, 4, 6, 9, 4, 2, 8, 0, 0, 7, 8, 8, 9, 5, 4, 6, 3, 5, 1, 0, 8, 4, 8, 1, 2, 6, 2, 3, 2, 7, 4, 1, 6, 1, 7, 3, 5, 7, 0, 0, 1, 9, 7, 2, 3, 8, 6, 5, 8, 7, 7, 7, 1, 2, 0, 3, 1, 5, 5 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

0,4

LINKS

Table of n, a(n) for n=0..98.

Index entries for linear recurrences with constant coefficients, signature (2,-2,1,0,0,-1,2,-2,1,0,0,-1,2,-2,1,0,0,-1,2,-2,1,0,0,-1,2,-2,1,0,0,-1,2,-2,1,0,0,-1,2,-2,1,0,0,-1,2,-2,1,0,0,-1,2,-2,1,0,0,-1,2,-2,1,0,0,-1,2,-2,1,0,0,-1,2,-2,1,0,0,-1,2,-2,1).

FORMULA

From Chai Wah Wu, Aug 10 2020: (Start)

a(n) = 2*a(n-1) - 2*a(n-2) + a(n-3) - a(n-6) + 2*a(n-7) - 2*a(n-8) + a(n-9) - a(n-12) + 2*a(n-13) - 2*a(n-14) + a(n-15) - a(n-18) + 2*a(n-19) - 2*a(n-20) + a(n-21) - a(n-24) + 2*a(n-25) - 2*a(n-26) + a(n-27) - a(n-30) + 2*a(n-31) - 2*a(n-32) + a(n-33) - a(n-36) + 2*a(n-37) - 2*a(n-38) + a(n-39) - a(n-42) + 2*a(n-43) - 2*a(n-44) + a(n-45) - a(n-48) + 2*a(n-49) - 2*a(n-50) + a(n-51) - a(n-54) + 2*a(n-55) - 2*a(n-56) + a(n-57) - a(n-60) + 2*a(n-61) - 2*a(n-62) + a(n-63) - a(n-66) + 2*a(n-67) - 2*a(n-68) + a(n-69) - a(n-72) + 2*a(n-73) - 2*a(n-74) + a(n-75) for n > 74.

G.f.: x^2*(-7*x^72 + 9*x^71 - 7*x^70 - 4*x^69 + 12*x^68 - 15*x^67 + 9*x^66 - 4*x^65 - 2*x^64 + x^63 + 3*x^62 - 8*x^61 + 3*x^60 + 5*x^59 - 9*x^58 - 3*x^57 + 15*x^56 - 23*x^55 + 19*x^54 - 8*x^53 - 4*x^52 + 2*x^51 + 6*x^50 - 16*x^49 + 13*x^48 - 9*x^47 - 3*x^45 + 8*x^44 - 10*x^43 + 7*x^42 - 10*x^41 + 14*x^40 - 19*x^39 + 11*x^38 - 4*x^37 + x^36 - 11*x^35 + 18*x^34 - 24*x^33 + 23*x^32 - 19*x^31 + 7*x^30 - 3*x^29 + 11*x^28 - 28*x^27 + 35*x^26 - 34*x^25 + 23*x^24 - 16*x^23 + 16*x^22 - 23*x^21 + 26*x^20 - 27*x^19 + 17*x^18 - 7*x^17 - x^16 - 6*x^15 + 16*x^14 - 20*x^13 + 11*x^12 + 2*x^11 - 8*x^10 + 7*x^8 - 13*x^7 + 5*x^6 + x^5 - 4*x^4 - 5*x^3 + 9*x^2 - 7*x - 1)/((x - 1)*(x^2 - x + 1)*(x^12 - x^11 + x^10 - x^9 + x^8 - x^7 + x^6 - x^5 + x^4 - x^3 + x^2 - x + 1)*(x^12 + x^11 + x^10 + x^9 + x^8 + x^7 + x^6 + x^5 + x^4 + x^3 + x^2 + x + 1)*(x^24 - x^23 + x^21 - x^20 + x^18 - x^17 + x^15 - x^14 + x^12 - x^10 + x^9 - x^7 + x^6 - x^4 + x^3 - x + 1)*(x^24 + x^23 - x^21 - x^20 + x^18 + x^17 - x^15 - x^14 + x^12 - x^10 - x^9 + x^7 + x^6 - x^4 - x^3 + x + 1)). (End)

CROSSREFS

Sequence in context: A195357 A328968 A267316 * A029688 A155792 A247226

Adjacent sequences:  A021508 A021509 A021510 * A021512 A021513 A021514

KEYWORD

nonn,cons

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified September 21 08:38 EDT 2020. Contains 337268 sequences. (Running on oeis4.)