|
| |
|
|
A000645
|
|
Number of alkyls X^{II} C_n H_{2n+1} Y with n carbon atoms.
(Formerly M1209 N0467)
|
|
0
| |
|
|
1, 2, 4, 10, 25, 64, 166, 437, 1157, 3087, 8276, 22287, 60230, 163284, 443820, 1209155, 3300890, 9027337, 24727437, 67829684, 186302693, 512301120, 1410237805, 3885803531, 10716571591, 29579231200, 81704634803, 225845362116
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 0,2
|
|
|
REFERENCES
| N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
G. Polya, Algebraische Berechnung der Anzahl der Isomeren einiger organischer Verbindungen, Zeit. f. Kristall., 93 (1936), 415-443; line 11 of Table I.
|
|
|
FORMULA
| G.f.: A(x) = A000598(x)/(1-A000642(x)).
|
|
|
CROSSREFS
| Sequence in context: A036887 A151536 A026269 * A005958 A166516 A189912
Adjacent sequences: A000642 A000643 A000644 * A000646 A000647 A000648
|
|
|
KEYWORD
| nonn,easy
|
|
|
AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
|
| |
|
|
