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A306743 Main diagonal of the array A306741. 2
1, 1, 2, 2, 4, 2, 4, 6, 4, 6, 6, 4, 10, 6, 6, 12, 6, 8, 12, 10, 12, 12, 12, 8, 16, 12, 12, 24, 6, 8, 24, 10, 12, 24, 12, 16, 24, 16, 20, 24, 20, 22, 24, 22, 24, 24, 24, 16, 28, 24, 24, 48, 6, 8, 48, 10, 12, 48, 12, 16, 48, 16, 20, 48, 20, 22, 48, 24, 24, 48 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

This sequence shows a chaotic behavior.

Empirically, a(n) is even for any n > 2.

LINKS

Rémy Sigrist, Table of n, a(n) for n = 1..10000

Rémy Sigrist, C++ program for A306743

FORMULA

a(n) = A306741(n, n).

EXAMPLE

a(3) = A306741(3, 3) = 2.

PROG

(C++) See Links section.

CROSSREFS

Cf. A005185, A306741.

Sequence in context: A059214 A091820 A171922 * A140821 A063789 A106264

Adjacent sequences:  A306740 A306741 A306742 * A306744 A306745 A306746

KEYWORD

nonn

AUTHOR

Rémy Sigrist, Mar 07 2019

STATUS

approved

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Last modified August 24 03:51 EDT 2019. Contains 326260 sequences. (Running on oeis4.)