id:A144217 - OEIS Search Results

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Weight array of A144216: a rectangular array by antidiagonals.

+0
2

0, 1, 1, 2, 0, 2, 3, 0, 0, 3, 4, 0, 0, 0, 4, 5, 0, 0, 0, 0, 5, 6, 0, 0, 0, 0, 0, 6, 7, 0, 0, 0, 0, 0, 0, 7, 8, 0, 0, 0, 0, 0, 0, 0, 8, 9, 0, 0, 0, 0, 0, 0, 0, 0, 9, 10, 0, 0, 0, 0, 0, 0, 0, 0, 0, 10, 11, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 11, 12, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 12, 13, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 (list; table; graph; listen)

	OFFSET	`1,4`
	FORMULA	`Start with R(m,n)=(m(m-1)+n(n-1))/2 for m>=1,n>=1. Put R(m,n)=0 if m=0 or n=0. Define w(m,n)=R(m,n)-R(m-1,n-1)-R(m,n-1)-R(m-1,n) for m>=1, n>=1. Then the weight array W={w(m,n)} is A144217. (See A144112.)`
	EXAMPLE	`Northwest corner:` `0 1 2 3 4 5` `1 0 0 0 0 0` `2 0 0 0 0 0` `3 0 0 0 0 0` `4 0 0 0 0 0`
	CROSSREFS	`Cf. A144217.` `Sequence in context: A129883 A098489 A128064 this_sequence A132814 A058623 A111565` `Adjacent sequences: A144214 A144215 A144216 this_sequence A144218 A144219 A144220`
	KEYWORD	`nonn,tabl`
	AUTHOR	`Clark Kimberling (ck6(AT)evansville.edu), Sep 14 2008`

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Last modified November 24 14:25 EST 2009. Contains 167438 sequences.

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