id:A166380 - OEIS Search Results

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Diagonal sums of exponential Riordan array [1+x^2*sec(x),x], A166378.

+0
2

1, 3, 19, 223, 4667, 160045, 8207125, 587420875, 55869454855, 6809387511403, 1034264079708019, 191477762192490649, 42435372869814513769, 11090351278621719882899, 3374951549996881393302715 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`a(n)=sum{k=0..n, C(n+k,2k)*A166377(k)}.`
	CROSSREFS	`Sequence in context: A158876 A001833 A001035 this_sequence A136652 A136504 A003111` `Adjacent sequences: A166377 A166378 A166379 this_sequence A166381 A166382 A166383`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Oct 13 2009`

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Last modified November 22 20:51 EST 2009. Contains 167312 sequences.

AT&T Labs Research