A135816 Alternating row sums of triangle A135814 (number of coincidence-free m-tuple lists of length n).

1, -1, 1, -2, 2, 9, 231, -208, -903776, -143213213, 118835487821, 388585756132242, -521157743571990450, -72978076847525420725075, -1904341683955074815027626877, 1483881447421749524769255709488292, 1360468742213189927760243663613128043340

Offset

0,4

Links

Table of n, a(n) for n=0..16.

Formula

a(n) = Sum_{m=0..n} A135814(n,m)*(-1)^m, n>=0.

Crossrefs

Cf. A135815 (row sums of A135814).

Sequence in context: A343406 A081086 A019514 * A157341 A038036 A297793

Adjacent sequences: A135813 A135814 A135815 * A135817 A135818 A135819

Keyword

sign,easy

Author

Wolfdieter Lang, Jan 21 2008

Status

approved