id:A143901 - OEIS Search Results

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Rectangular array R by antidiagonals: R(m,n) = number of white squares

+0
2

1, 1, 1, 2, 2, 2, 2, 3, 3, 2, 3, 4, 5, 4, 3, 3, 5, 6, 6, 5, 3, 4, 6, 8, 8, 8, 6, 4, 4, 7, 9, 10, 10, 9, 7, 4, 5, 8, 11, 12, 13, 12, 11, 8, 5, 5, 9, 12, 14, 15, 15, 14, 12, 9, 5, 6, 10, 14, 16, 18, 18, 18, 16, 14, 10, 6, 6, 11, 15, 18, 20, 21, 21, 20, 18, 15, 11, 6, 7, 12, 17, 20, 23, 24, 25, 24 (list; table; graph; listen)

	OFFSET	`1,4`
	COMMENT	`Antidiagonal sums: (1,2,6,10,19,...)=A005993.` `Diagonals: A000982, A000217, A007590, A000096, A116940.` `Rows and columns: A004526, A000027, A007494, A005843, A047218 et al.`
	FORMULA	`R(m,n)=Floor((mn+1)/2).`
	EXAMPLE	`Northwest corner:` `1 1 2 2 3 3 4 4` `1 2 3 4 5 6 7 8` `2 3 5 6 8 9 11 12` `2 4 6 8 10 12 14 16`
	CROSSREFS	`Cf. A143902.` `Sequence in context: A093450 A096198 A103183 this_sequence A115263 A055894 A120425` `Adjacent sequences: A143898 A143899 A143900 this_sequence A143902 A143903 A143904`
	KEYWORD	`nonn,tabl`
	AUTHOR	`Clark Kimberling (ck6(AT)evansville.edu), Sep 04 2008`

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Last modified November 18 20:14 EST 2008. Contains 147244 sequences.

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