A236023 - OEIS

A236023

Decimal expansion of log_2 (5) - log_3 (7).

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

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OFFSET

0,1

COMMENTS

Decimal expansion of minimal value of function gamma(n) = log_2(n+1) - log_tau(n) (sigma(n)) for n = 4, where gamma(n) is called the gamma-deviation from primality of the number n (see A236022).

LINKS

Table of n, a(n) for n=0..94.

FORMULA

Equals log(5)/log(2) - log(7)/log(3) = A020858 - A152565.

EXAMPLE

0.550684345725940087802391122406...

MATHEMATICA

RealDigits[Log2[5] - Log[3, 7], 10, 120][[1]] (* Amiram Eldar, Jun 06 2023 *)

CROSSREFS

Cf. A236020, A236021, A236022, A236024, A236025, A236026.

Cf. A020858, A152565.

Sequence in context: A021649 A357715 A200257 * A373017 A200516 A233383

Adjacent sequences: A236020 A236021 A236022 * A236024 A236025 A236026

KEYWORD

nonn,cons

AUTHOR

Jaroslav Krizek, Jan 18 2014

STATUS

approved