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A112080 a(n) = difference between Jacobi-first-non-one(24n+1) and Jacobi-first-non-one(24n-1). 4
0, 2, -2, 0, 4, 0, 8, -2, 0, 0, 0, 12, -6, 0, 12, 0, 2, -2, 0, -6, 0, 18, -6, 0, 0, 0, 2, -6, 0, -4, 0, 2, -2, 0, 18, 0, 2, -2, 0, 24, 0, 6, -2, 0, 0, 0, 6, -8, 0, 4, 0, 2, -2, 0, -6, 0, 32, -6, 0, 0, 0, 2, -6, 0, -10, 0, 2, -2, 0, 28, 0, 2, -2, 0, 4, 0, 38, -2, 0, 0, 0, 6, -6, 0, 4, 0, 2 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

The definition of Jacobi-first-non-one is given in A112056.

LINKS

A. Karttunen, Table of n, a(n) for n = 1..4096

FORMULA

a(n) = 4*A112054(n)+1.

CROSSREFS

A112081(n) = a(n)/2. A112082 gives the points where a(n) is zero. A112059 gives the nonzero terms.

Sequence in context: A138476 A131381 A295215 * A052176 A138092 A138090

Adjacent sequences:  A112077 A112078 A112079 * A112081 A112082 A112083

KEYWORD

sign

AUTHOR

Antti Karttunen, Aug 27 2005

STATUS

approved

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Last modified February 19 12:09 EST 2019. Contains 320310 sequences. (Running on oeis4.)