|
Search: id:A062125
|
|
| |
|
| 5, 56, 263, 815, 1982, 4115, 7646, 13088, 21035, 32162, 47225, 67061, 92588, 124805, 164792, 213710, 272801, 343388, 426875, 524747, 638570, 769991, 920738, 1092620, 1287527, 1507430, 1754381, 2030513, 2338040, 2679257, 3056540
(list; graph; listen)
|
|
|
OFFSET
|
0,1
|
|
|
REFERENCES
|
I. P. Goulden and D. M. Jackson, Combinatorial Enumeration, Wiley, N.Y., 1983,(2.3.14).
|
|
FORMULA
|
G.f.: (5+33*x^2+10*x^3+31*x+2*x^4)/(1-x)^5. Generally, g.f. for k-th column of A046741 is coefficient of y^k in expansion of (1-y)/((1-y-y^2)*(1-y)-(1+y)*x).
|
|
CROSSREFS
|
Cf. dumbbells: A002940, A002941, A002889, A046741, A055608, A062123-A062127.
Sequence in context: A067515 A072318 A041995 this_sequence A030060 A073563 A006658
Adjacent sequences: A062122 A062123 A062124 this_sequence A062126 A062127 A062128
|
|
KEYWORD
|
easy,nonn
|
|
AUTHOR
|
Vladeta Jovovic (vladeta(AT)eunet.rs), Jun 04 2001
|
|
EXTENSIONS
|
More terms from Larry Reeves (larryr(AT)acm.org), Jun 06 2001
|
|
|
Search completed in 0.002 seconds
|
