A371526 -id:A371526 - cp's OEIS frontend

A371525 Decimal expansion of Product_{k>=1} (1 + 1/Lucas(k)).

4, 7, 9, 6, 2, 8, 8, 5, 2, 3, 1, 8, 8, 3, 8, 5, 4, 6, 3, 8, 1, 0, 3, 7, 0, 1, 4, 0, 7, 5, 1, 2, 1, 5, 8, 4, 9, 8, 1, 9, 5, 1, 6, 3, 0, 8, 0, 9, 2, 3, 4, 7, 7, 4, 1, 8, 3, 7, 3, 9, 5, 7, 2, 2, 0, 5, 7, 8, 3, 4, 2, 6, 1, 6, 7, 9, 3, 5, 0, 8, 9, 5, 4, 9, 8, 5, 7, 6, 6, 1, 0, 8, 0, 0, 6, 2, 8, 3, 1, 2, 5, 4, 6, 6, 6

Offset: 1

Amiram Eldar, Mar 26 2024

Any two of the four constants {A337668, A337669, this, A371526} are algebraically independent over Q, while any three are not (Duverney et al., 2022).

			4.79628852318838546381037014075121584981951630809234...

Daniel Duverney, Carsten Elsner, Masanobu Kaneko, and Yohei Tachiya, A criterion of algebraic independence of values of modular functions and an application to infinite products involving Fibonacci and Lucas numbers, Research in Number Theory, Vol. 8 (2022), Article 31; alternative link.
Eric Weisstein's World of Mathematics, Dedekind Eta Function.
Wikipedia, Dedekind eta function.

Cf. A000032, A001622, A002390, A337668, A337669, A371526, A371527, A371528, A371529, A371530.

With[{eta = DedekindEta, tau0 = Log[GoldenRatio]*I/Pi}, RealDigits[2 * Surd[GoldenRatio, 4] * eta[2*tau0]^3 * eta[3*tau0]/(eta[tau0]^2 * eta[4*tau0]), 10, 120][[1]]]

prodinf(k = 1, 1 + 1/(fibonacci(k-1) + fibonacci(k+1)))

Equals Product_{k>=1} (1 + 1/A000032(k)).
Equals 2 * sqrt(5) * A371529.
Equals 2 * phi^(1/4) * eta(2*tau_0)^3 * eta(3*tau_0) / (eta(tau_0)^2 * eta(4*tau_0)), where phi is the golden ratio (A001622), tau_0 = i*log(phi)/Pi, and i = sqrt(-1) (Duverney et al., 2022).

A371527 Decimal expansion of Product_{k>=2} (1 + (-1)^k/Fibonacci(k)).

Original entry on oeis.org

1, 1, 3, 8, 7, 3, 4, 8, 6, 1, 7, 0, 7, 1, 9, 6, 2, 1, 8, 0, 9, 6, 8, 9, 5, 0, 8, 5, 7, 4, 2, 0, 4, 3, 1, 8, 7, 6, 3, 7, 8, 8, 8, 9, 4, 7, 9, 1, 5, 7, 3, 2, 5, 1, 3, 7, 4, 4, 1, 3, 4, 4, 2, 4, 2, 6, 4, 9, 2, 2, 8, 1, 6, 7, 4, 2, 2, 2, 2, 2, 6, 7, 4, 0, 0, 7, 8, 6, 2, 3, 9, 3, 3, 8, 4, 0, 9, 2, 1, 7, 6, 4, 4, 3, 9

Offset: 1

Amiram Eldar, Mar 26 2024

			1.13873486170719621809689508574204318763788894791573...

Daniel Duverney, Carsten Elsner, Masanobu Kaneko, and Yohei Tachiya, A criterion of algebraic independence of values of modular functions and an application to infinite products involving Fibonacci and Lucas numbers, Research in Number Theory, Vol. 8 (2022), Article 31; alternative link.
Eric Weisstein's World of Mathematics, Dedekind Eta Function.
Wikipedia, Dedekind eta function.

Cf. A000045, A001622, A002390, A337668, A337669, A371525, A371526, A371528, A371529, A371530.

With[{eta = DedekindEta, tau0 = Log[GoldenRatio]*I/Pi}, RealDigits[2 * Sqrt[5] * Surd[GoldenRatio^5, 4] * eta[tau0]^3 * eta[4*tau0]/eta[2*tau0]^2, 10, 120][[1]]]

PARI
```
prodinf(k = 2, 1 + (-1)^k/fibonacci(k))
```

Equals Product_{k>=2} (1 + (-1)^k/A000045(k)).
Equals 6 * A337669.
Equals 2 * sqrt(5) * phi^(5/4) * eta(tau_0)^3 * eta(4*tau_0) / eta(2*tau_0)^2, where phi is the golden ratio (A001622), tau_0 = i*log(phi)/Pi, and i = sqrt(-1) (Duverney et al., 2022).

A371528 Decimal expansion of Product_{k>=3} (1 - (-1)^k/Fibonacci(k)).

Original entry on oeis.org

1, 0, 9, 5, 9, 1, 3, 8, 8, 8, 1, 4, 8, 6, 8, 2, 0, 3, 0, 6, 3, 4, 3, 6, 9, 4, 4, 7, 5, 5, 2, 2, 2, 1, 5, 7, 7, 6, 8, 2, 5, 1, 6, 6, 2, 8, 5, 9, 7, 0, 2, 3, 7, 2, 5, 1, 1, 2, 8, 4, 1, 7, 2, 8, 9, 2, 9, 8, 0, 8, 1, 7, 0, 5, 0, 2, 3, 0, 0, 9, 8, 4, 0, 9, 3, 1, 8, 6, 8, 0, 2, 4, 8, 6, 1, 0, 9, 3, 3, 6, 2, 6, 7, 8, 1

Offset: 1

Amiram Eldar, Mar 26 2024

			1.09591388814868203063436944755222157768251662859702...

Daniel Duverney, Carsten Elsner, Masanobu Kaneko, and Yohei Tachiya, A criterion of algebraic independence of values of modular functions and an application to infinite products involving Fibonacci and Lucas numbers, Research in Number Theory, Vol. 8 (2022), Article 31; alternative link.
Eric Weisstein's World of Mathematics, Dedekind Eta Function.
Wikipedia, Dedekind eta function.

Cf. A000045, A001622, A002390, A337668, A337669, A371525, A371526, A371527, A371529, A371530.

With[{eta = DedekindEta, tau0 = Log[GoldenRatio]*I/Pi}, RealDigits[(Surd[GoldenRatio^5, 4] / 3) * eta[4*tau0]/eta[tau0], 10, 120][[1]]]

PARI
```
prodinf(k = 3, 1 - (-1)^k/fibonacci(k))
```

Equals Product_{k>=2} (1 - (-1)^k/A000045(k)).
Equals A337668 / 12.
Equals (phi^(5/4)/3) * eta(4*tau_0) / eta(tau_0), where phi is the golden ratio (A001622), tau_0 = i*log(phi)/Pi, and i = sqrt(-1) (Duverney et al., 2022).

A371529 Decimal expansion of Product_{k>=2} (1 + (-1)^k/Lucas(k)).

Original entry on oeis.org

1, 0, 7, 2, 4, 8, 2, 7, 1, 7, 7, 5, 5, 1, 3, 0, 6, 2, 5, 8, 8, 5, 3, 7, 8, 8, 1, 6, 5, 2, 6, 6, 0, 8, 6, 9, 3, 0, 4, 3, 9, 2, 0, 4, 9, 3, 3, 3, 0, 9, 9, 2, 3, 6, 1, 3, 8, 5, 3, 2, 8, 7, 0, 9, 3, 9, 5, 9, 7, 6, 0, 7, 4, 3, 7, 7, 8, 3, 0, 4, 2, 5, 6, 5, 5, 8, 2, 3, 8, 9, 8, 1, 3, 1, 1, 4, 4, 8, 4, 0, 6, 4, 8, 4, 6

Offset: 1

Amiram Eldar, Mar 26 2024

			1.07248271775513062588537881652660869304392049333099...

Daniel Duverney, Carsten Elsner, Masanobu Kaneko, and Yohei Tachiya, A criterion of algebraic independence of values of modular functions and an application to infinite products involving Fibonacci and Lucas numbers, Research in Number Theory, Vol. 8 (2022), Article 31; alternative link.
Eric Weisstein's World of Mathematics, Dedekind Eta Function.
Wikipedia, Dedekind eta function.

Cf. A000032, A001622, A002390, A337668, A337669, A371525, A371526, A371527, A371528, A371530.

With[{eta = DedekindEta, tau0 = Log[GoldenRatio]*I/Pi}, RealDigits[(Surd[GoldenRatio, 4] / Sqrt[5]) * eta[2*tau0]^3 * eta[3*tau0] / (eta[tau0]^2 * eta[4*tau0]), 10, 120][[1]]]

prodinf(k = 2, 1 + (-1)^k/(fibonacci(k-1) + fibonacci(k+1)))

Equals Product_{k>=2} (1 + (-1)^k/A000032(k)).
Equals A371525 / (2*sqrt(5)).
Equals (phi^(1/4) / sqrt(5)) * eta(2*tau_0)^3 * eta(3*tau_0) / (eta(tau_0)^2 * eta(4*tau_0)), where phi is the golden ratio (A001622), tau_0 = i*log(phi)/Pi, and i = sqrt(-1) (Duverney et al., 2022).

A371530 Decimal expansion of Product_{k>=1} (1 - (-1)^k/Lucas(k)).

Original entry on oeis.org

1, 5, 0, 2, 1, 8, 0, 0, 4, 4, 3, 3, 2, 4, 5, 6, 7, 6, 9, 1, 2, 0, 7, 6, 2, 5, 8, 1, 7, 6, 5, 5, 6, 9, 9, 8, 8, 0, 2, 7, 1, 5, 2, 5, 8, 0, 8, 8, 8, 8, 8, 3, 6, 4, 4, 5, 1, 5, 0, 1, 5, 5, 1, 1, 7, 0, 7, 8, 7, 4, 1, 9, 3, 3, 3, 7, 5, 9, 4, 6, 3, 2, 9, 9, 3, 4, 4, 3, 7, 1, 9, 2, 1, 5, 9, 4, 8, 3, 9, 2, 4, 1, 0, 8, 8

Offset: 1

Amiram Eldar, Mar 26 2024

			1.50218004433245676912076258176556998802715258088888...

Daniel Duverney, Carsten Elsner, Masanobu Kaneko, and Yohei Tachiya, A criterion of algebraic independence of values of modular functions and an application to infinite products involving Fibonacci and Lucas numbers, Research in Number Theory, Vol. 8 (2022), Article 31; alternative link.
Eric Weisstein's World of Mathematics, Dedekind Eta Function.
Wikipedia, Dedekind eta function.

Cf. A000032, A001622, A002390, A337668, A337669, A371525, A371526, A371527, A371528, A371529.

With[{eta = DedekindEta, tau0 = Log[GoldenRatio]*I/Pi}, RealDigits[2 * Surd[GoldenRatio, 4] * eta[2*tau0]^2 * eta[6*tau0]/(eta[3*tau0] * eta[4*tau0]), 10, 120][[1]]]

prodinf(k = 1, 1 - (-1)^k/(fibonacci(k-1) + fibonacci(k+1)))

Equals Product_{k>=2} (1 - (-1)^k/A000032(k)).
Equals (2*sqrt(5)) * A371526.
Equals 2 * phi^(1/4) * eta(2*tau_0)^2 * eta(6*tau_0) / (eta(3*tau_0) * eta(4*tau_0)), where phi is the golden ratio (A001622), tau_0 = i*log(phi)/Pi, and i = sqrt(-1) (Duverney et al., 2022).

A371650 Decimal expansion of Product_{k>=0} (1 + 1/Lucas(5^k)).

Original entry on oeis.org

2, 1, 8, 1, 8, 3, 1, 1, 8, 7, 3, 3, 3, 0, 6, 2, 0, 2, 3, 8, 4, 2, 3, 6, 0, 1, 7, 0, 5, 5, 6, 7, 6, 1, 0, 6, 7, 8, 0, 2, 4, 3, 5, 6, 4, 6, 9, 5, 7, 9, 6, 9, 2, 4, 1, 3, 1, 7, 0, 3, 2, 2, 5, 2, 9, 1, 3, 8, 0, 9, 1, 2, 6, 4, 3, 6, 0, 1, 6, 1, 9, 9, 2, 4, 7, 4, 9, 2, 0, 7, 3, 4, 0, 6, 4, 4, 1, 6, 0, 3, 5, 5, 7, 5, 0, 0, 2

Offset: 1

Amiram Eldar, Mar 31 2024

This constant is a transcendental number (Nyblom, 2004).

			2.18183118733306202384236017055676106780243564695796...

M. A. Nyblom, On the Construction of a Family of Transcendental Valued Infinite Products, Fibonacci Quarterly, Vol. 42, No. 4 (2004), pp. 353-358.
Index entries for transcendental numbers.

Cf. A000032, A144837, A371649.

Similar constants: A371525, A371526, A371648.

RealDigits[Product[1 + 1/LucasL[5^k], {k, 0, 10}], 10, 120][[1]]

prodinf(k = 0, 1 + 1/(fibonacci(5^k-1) + fibonacci(5^k+1)))

Equals Product_{k>=0} (1 + 1/A144837(k)).

cp's OEIS Frontend

A371525 Decimal expansion of Product_{k>=1} (1 + 1/Lucas(k)).

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A371527 Decimal expansion of Product_{k>=2} (1 + (-1)^k/Fibonacci(k)).

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A371528 Decimal expansion of Product_{k>=3} (1 - (-1)^k/Fibonacci(k)).

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A371529 Decimal expansion of Product_{k>=2} (1 + (-1)^k/Lucas(k)).

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A371530 Decimal expansion of Product_{k>=1} (1 - (-1)^k/Lucas(k)).

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A371650 Decimal expansion of Product_{k>=0} (1 + 1/Lucas(5^k)).

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