id:A091918 - OEIS Search Results

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A091918

Inverse of number triangle A091917.

+0
2

1, 2, 1, 4, 2, 1, 8, 3, 3, 1, 16, 4, 6, 4, 1, 32, 5, 10, 10, 5, 1, 64, 6, 15, 20, 15, 6, 1, 128, 7, 21, 35, 35, 21, 7, 1, 256, 8, 28, 56, 70, 56, 28, 8, 1, 512, 9, 36, 84, 126, 126, 84, 36, 9, 1, 1024, 10, 45, 120, 210, 252, 210, 120, 45, 10, 1, 2048, 11, 55, 165, 330, 462, 462, 330 (list; table; graph; listen)

	OFFSET	`0,2`
	COMMENT	`Essentially, Pascal's triangle A007318 with first column of 1's replaced by 2^n Row sums are A000225(n+1). Diagonal sums are A000225(n)+A000045(n).`
	FORMULA	`Binomial transform of triangle A103451: (1; 1,1; 1,0,1; 1,0,0,1;...). - Gary W. Adamson (qntmpkt(AT)yahoo.com), Aug 08 2007`
	CROSSREFS	`Cf. A103451.` `Sequence in context: A135287 A089606 A140740 this_sequence A138895 A138846 A130321` `Adjacent sequences: A091915 A091916 A091917 this_sequence A091919 A091920 A091921`
	KEYWORD	`nonn,tabl`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Feb 13 2004`

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Last modified November 29 12:46 EST 2009. Contains 167659 sequences.

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