A093399 - OEIS

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A093399

Absolute value of difference between counts of uninterrupted runs of 3 nonprimes in A093187 and A093188.

6

0, 1, 5, 4, 34, 116, 130, 241, 2187, 3076, 9683, 33067, 133346

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,3

LINKS

Table of n, a(n) for n=1..13.

FORMULA

Take the absolute value of differences between counts of runs of 3 odd nonprimes congruent to 1 mod 4 and 3 mod 4

a(n) = abs(A093187(n) - A093188(n))

EXAMPLE

a(3)=5 because in A093187 the count is 10 and in A093188 the count is 5. 10-5=5.

CROSSREFS

Cf. A093187 A093188 A092642 A092643 A092644.

Sequence in context: A297936 A298548 A078811 * A123233 A189748 A304151

Adjacent sequences: A093396 A093397 A093398 * A093400 A093401 A093402

KEYWORD

more,nonn,hard

AUTHOR

Enoch Haga, Mar 30 2004

EXTENSIONS

a(9)-a(13) from Lucas A. Brown, Sep 19 2024

STATUS

approved