A027975 - OEIS

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A027975

a(n) = n-th diagonal sum of left justified array T given by A027960.

1, 1, 4, 5, 8, 12, 16, 23, 31, 42, 57, 76, 102, 136, 181, 241, 320, 425, 564, 748, 992, 1315, 1743, 2310, 3061, 4056, 5374, 7120, 9433, 12497, 16556, 21933 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,3`
	FORMULA	`G.f.: (2x^2+1)/[(1-x)(1-x^2-x^3)].`
	CROSSREFS	`Sequence in context: A188095 A190675 A188077 * A011980 A061765 A133940` `Adjacent sequences: A027972 A027973 A027974 * A027976 A027977 A027978`
	KEYWORD	`nonn`
	AUTHOR	`Clark Kimberling (ck6(AT)evansville.edu)`

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Last modified February 14 02:39 EST 2012. Contains 205567 sequences.