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A098496 Antidiagonal sums of triangle A098495. 1
1, 1, -1, -3, 0, 5, -2, -6, 18, -28, -9, 232, -949, 2147, 579, -34487, 202078, -680541, 527630, 11789818, -104485820, 520965294, -1270746269, -5790611092, 98629011681, -729706466727, 3269817273787, -2007499839343, -131143854669640, 1558206734632453 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

LINKS

Table of n, a(n) for n=0..29.

MATHEMATICA

T[r_, 1] := 1; T[r_, 2] := -r - 1; T[r_, c_] := -r*T[r, c - 1] - T[r, c - 2]; Table[ Sum[ T[n - i, i], {i, n + 1}], {n, 0, 12}] (* Robert G. Wilson v, May 10 2005 *)

CROSSREFS

Sequence in context: A215447 A159980 A343054 * A175297 A165754 A193067

Adjacent sequences:  A098493 A098494 A098495 * A098497 A098498 A098499

KEYWORD

sign

AUTHOR

Ralf Stephan, Sep 12 2004

EXTENSIONS

More terms from Robert G. Wilson v, May 10 2005

STATUS

approved

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Last modified April 14 12:11 EDT 2021. Contains 342949 sequences. (Running on oeis4.)