

A098173


Triangle T(n,k) with diagonals T(n,nk)=Binomial(n,4k).


1



1, 0, 1, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 1, 0, 0, 0, 0, 5, 1, 0, 0, 0, 0, 0, 15, 1, 0, 0, 0, 0, 0, 0, 35, 1, 0, 0, 0, 0, 0, 0, 1, 70, 1, 0, 0, 0, 0, 0, 0, 0, 9, 126, 1, 0, 0, 0, 0, 0, 0, 0, 0, 45, 210, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 165, 330, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 495, 495, 1, 0, 0, 0, 0, 0, 0
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OFFSET

0,20


COMMENTS

Row sums are A038503.


LINKS

Table of n, a(n) for n=0..96.


FORMULA

Triangle T(n, k)=Binomial(n, 4(nk)).


EXAMPLE

Rows begin {1}, {0,1}, {0,0,1}, {0,0,0,1}, {0,0,0,1,1}, {0,0,0,0,5,1},...


CROSSREFS

Cf. A098158, A098172.
Sequence in context: A215616 A249737 A129205 * A180977 A269129 A320606
Adjacent sequences: A098170 A098171 A098172 * A098174 A098175 A098176


KEYWORD

easy,nonn,tabl


AUTHOR

Paul Barry, Aug 30 2004


STATUS

approved



