id:A000648 - OEIS Search Results

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Number of alkyls C_{n+15} H_{2n+10} (Anthr.) with n carbon atoms.
(Formerly M3045 N1235)

+0
2

1, 3, 18, 61, 225, 716, 2272, 6826, 20238, 58552, 167625, 473929, 1330490, 3709591, 10296336, 28466065, 78481065, 215878221, 592832960, 1625887129, 4454936029, 12198071235, 33383810793, 91336813784, 249851178964, 683421422654 (list; graph; listen)

	OFFSET	`0,2`
	REFERENCES	`G. Polya, Algebraische Berechnung der Anzahl der Isomeren einiger organischer Verbindungen, Zeit. f. Kristall., 93 (1936), 415-443; line 15 of table I.`
	FORMULA	`G.f.: A(x) = (r(x)^10+r(x)^2r(x^2)^4+2r(x^2)^5)/4, r(x) = A000598(x).`
	CROSSREFS	`Cf. A000649.` `Sequence in context: A006011 A012779 A074439 this_sequence A110689 A027333 A026576` `Adjacent sequences: A000645 A000646 A000647 this_sequence A000649 A000650 A000651`
	KEYWORD	`nonn,easy`
	AUTHOR	`njas`

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.

AT&T Labs Research