A251551 - OEIS

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A251551

a(n) = A251546(n) - A251549(n).

-1, 1, -1, 1, 1, 1, 1, 1, -1, 3, 3, 3, 3, 3, -1, 7, 7, 7, 7, 7, 7, 5, 1, 1, 1, 1, 1, 1, 1, -1, 5, 5, 11, 11, 11, 11, 11, 11, 19, 19, 21, 21, 17, 17, 17, 17, 17, 23, 23, 23, 17, 17, 17, 17, 17, 25, 25, 25, 25, 25, 23, 17

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

OFFSET

1,10

LINKS

Chai Wah Wu, Table of n, a(n) for n = 1..10000

PROG

(Haskell)

a251551 n = a251546 n - a251549 n -- Reinhard Zumkeller, Dec 19 2014

CROSSREFS

Cf. A098550, A247253, A251416, A251417, A251546-A251552.

Sequence in context: A097675 A141605 A356002 * A073139 A122845 A135203

Adjacent sequences: A251548 A251549 A251550 * A251552 A251553 A251554

KEYWORD

sign

AUTHOR

N. J. A. Sloane, Dec 18 2014

STATUS

approved