A208225
a(n)=(a(n-1)^3*a(n-3)^3+a(n-2))/a(n-4) with a(0)=a(1)=a(2)=a(3)=1.
Original entry on oeis.org
1, 1, 1, 1, 2, 9, 731, 3124943137, 11123050014071530610530827873034
Offset: 0
-
y:=proc(n) if n<4 then return 1: fi: return (y(n-1)^3*y(n-3)^3+y(n-2))/y(n-4): end:
seq(y(n),n=0..9);
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RecurrenceTable[{a[0]==a[1]==a[2]==a[3]==1,a[n]==(a[n-1]^3 a[n-3]^3+ a[n-2])/ a[n-4]},a,{n,10}] (* Harvey P. Dale, Aug 25 2016 *)
A208227
a(n) = (a(n-1)^2*a(n-3)^4+a(n-2))/a(n-4) with a(0)=a(1)=a(2)=a(3)=1.
Original entry on oeis.org
1, 1, 1, 1, 2, 5, 27, 11669, 42551737826, 192450770996317798484507077, 25433732883480327279167427243395261255488704554514737402263583619505
Offset: 0
-
y:=proc(n) if n<4 then return 1: fi: return (y(n-1)^2*y(n-3)^4+y(n-2))/y(n-4): end:
seq(y(n),n=0..10);
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a[n_]:=If[n<4,1, (a[n - 1]^2*a[n- 3]^4 + a[n - 2])/a[n - 4]]; Table[a[n], {n, 0, 10}] (* Indranil Ghosh, Mar 19 2017 *)
A208221
a(n)=(a(n-1)^2*a(n-3)^2+a(n-2))/a(n-4) with a(0)=a(1)=a(2)=a(3)=1.
Original entry on oeis.org
1, 1, 1, 1, 2, 5, 27, 2921, 106653026, 1658455747832683945, 869174798276372512100586962107665002957113
Offset: 0
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y:=proc(n) if n<4 then return 1: fi: return (y(n-1)^2*y(n-3)^2+y(n-2))/y(n-4): end:
seq(y(n),n=0..11);
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a[n_] := a[n] = If[n <= 3, 1, (a[n-1]^2*a[n-3]^2 + a[n-2])/a[n-4]];
Table[a[n], {n, 0, 13}] (* Jean-François Alcover, Nov 24 2017 *)
RecurrenceTable[{a[0]==a[1]==a[2]==a[3]==1,a[n]==(a[n-1]^2 a[n-3]^2+ a[n-2])/ a[n-4]},a,{n,12}] (* Harvey P. Dale, Dec 17 2017 *)
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