A113998 - OEIS

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A113998

Reverse of triangle A051731.

1, 1, 1, 1, 0, 1, 1, 0, 1, 1, 1, 0, 0, 0, 1, 1, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 1, 0, 1, 1, 1, 0, 0, 0, 0, 0, 1, 0, 1, 1, 0, 0, 0, 0, 1, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 1, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 1

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

OFFSET

1,1

COMMENTS

Row sums are A000005. Diagonal sums are A001227 (?). Row k corresponds to A113999(k).

LINKS

Table of n, a(n) for n=1..105.

FORMULA

Sum_{k, 1<=k<=n} k*T(n,k)=A081307(n) - Philippe Deléham, Feb 03 2007

EXAMPLE

Triangle begins

1,1;

1,0,1;

1,0,1,1;

1,0,0,0,1;

1,0,0,1,1,1;

1,0,0,0,0,0,1;

1,0,0,0,1,0,1,1;

CROSSREFS

Sequence in context: A174391 A343910 A329682 * A253084 A182741 A070909

Adjacent sequences: A113995 A113996 A113997 * A113999 A114000 A114001

KEYWORD

nonn,tabl

AUTHOR

Paul Barry, Nov 12 2005

STATUS

approved