id:A154372 - OEIS Search Results

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From A152650/A152656,coefficients of other exponential polynomials(*). a(n) is triangle A152818 where terms of each column is divided by the beginning one. See A000004,A001787(n+1),A006043=2*A027472,A006044=6*A038846.

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1, 1, 1, 1, 4, 1, 1, 12, 9, 1, 1, 32, 54, 16, 1, 1, 80, 270, 160, 25, 1, 1, 192, 1215, 1280, 375, 36, 1 (list; graph; listen)

	OFFSET	`0,5`
	COMMENT	`(*) Not factorial as written in A006044. See A000110,Bell-Touchard. Second diagonal is 1,4,9,16,25, denominators of Lyman's spectrum of hydrogen,A000290(n+1)=deleted A147883,which has homogeneous indices for denominators series of Rydberg-Ritz spectrum of hydrogen.`
	CROSSREFS	`Sequence in context: A156049 A101919 A055106 this_sequence A080416 A099759 A072590` `Adjacent sequences: A154369 A154370 A154371 this_sequence A154373 A154374 A154375`
	KEYWORD	`nonn,uned`
	AUTHOR	`Paul Curtz (bpcrtz(AT)free.fr), Jan 08 2009`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.