A167752 - OEIS

A167752

Hankel transform of A167750.

1, 1, 1, 0, -1, 0, 1, 0, 0, -1, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, -1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, -1

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OFFSET

0,1

COMMENTS

The nonzero terms appear to be indexed by the quarter-squares floor((n+1)^2/4) = A002620(n+1).

abs(a(n)) = A237347(n) - 2. - Reinhard Zumkeller, Mar 18 2014

LINKS

Table of n, a(n) for n=0..49.

CROSSREFS

Cf. A167753.

Sequence in context: A297086 A349920 A369253 * A240025 A100923 A050073

Adjacent sequences: A167749 A167750 A167751 * A167753 A167754 A167755

KEYWORD

sign

AUTHOR

Paul Barry, Nov 10 2009

STATUS

approved