id:A082105 - OEIS Search Results

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A symmetric square array of numbers, read by antidiagonals.

+0
7

1, 1, 1, 1, 6, 1, 1, 13, 13, 1, 1, 22, 33, 22, 1, 1, 33, 61, 61, 33, 1, 1, 46, 97, 118, 97, 46, 1, 1, 61, 141, 193, 193, 141, 61, 1, 1, 78, 193, 286, 321, 286, 193, 78, 1, 1, 97, 253, 397, 481, 481, 397, 253, 97, 1, 1, 118, 321, 526, 673, 726, 673, 526, 321, 118, 1, 1, 141, 397 (list; table; graph; listen)

	OFFSET	`0,5`
	COMMENT	`Rows include A028872, A082109. Main diagonal is A082106. Other diagonals include A047673. Diagonal sums (row sums if viewed as number triangle) are A082107`
	FORMULA	`Square array defined by T(n, k)=(k^2n^2+4kn+1)`
	EXAMPLE	`Rows start` `1 1 1 1 1 ...` `1 6 13 22 33 ...` `1 13 33 61 97 ...` `1 22 61 118 193...` `1 33 97 193 321...`
	CROSSREFS	`Cf. A082043, A082046.` `Sequence in context: A131063 A081579 A146772 this_sequence A143210 A152238 A086645` `Adjacent sequences: A082102 A082103 A082104 this_sequence A082106 A082107 A082108`
	KEYWORD	`easy,nonn,tabl`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Apr 03 2003`

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Last modified December 2 11:54 EST 2009. Contains 167921 sequences.

AT&T Labs Research