id:A104882 - OEIS Search Results

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Diagonal sums of number triangle A104881.

+0
2

1, 1, 2, 3, 5, 8, 14, 24, 45, 85, 170, 351, 749, 1656, 3758, 8776, 21013, 51473, 129018, 329939, 860901, 2288528, 6192526, 17047248, 47693661, 135554549, 391099370, 1144867871, 3398656893, 10226072720, 31173964942, 96240485104, 300777706053 (list; graph; listen)

	OFFSET	`0,3`
	FORMULA	`a(n)=sum{k=0..floor(n/2), sum{j=0..k, (n-2k)^(k-j)}}.`
	CROSSREFS	`Sequence in context: A007059 A108296 A072100 this_sequence A091956 A107480 A128021` `Adjacent sequences: A104879 A104880 A104881 this_sequence A104883 A104884 A104885`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Mar 28 2005`

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.

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