A126158 - OEIS

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A126158

Secondary diagonal of symmetric triangle A126155: a(n) = A126155(n+1,n).

1, 35, 1195, 63365, 5126905, 594825635, 93900238195, 19371302880965, 5061231946045105, 1633629246059544035, 638388562675692767995, 297033561831219312442565, 162266449500902451982091305

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

OFFSET

0,2

LINKS

Table of n, a(n) for n=0..12.

FORMULA

a(n)=A126157(n+1)-4*A126157(n). - Philippe Deléham, Jul 22 2007

CROSSREFS

Cf. A126155; A126156 (column 0), A126157 (main diagonal).

Sequence in context: A170716 A170754 A218737 * A200724 A207492 A207889

Adjacent sequences: A126155 A126156 A126157 * A126159 A126160 A126161

KEYWORD

nonn

AUTHOR

Paul D. Hanna, Dec 20 2006

STATUS

approved