|
| |
|
|
A038225
|
|
Top line of 4-wave sequence A038197, also bisection of A006357.
|
|
0
| |
|
|
1, 4, 30, 246, 2037, 16886, 139997, 1160693, 9623140, 79784098, 661478734, 5484227157, 45468956106, 376976720745, 3125460977225, 25912757426660, 214839027697334, 1781200165693270, 14767680082482085, 122436758775876478
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 0,2
|
|
|
LINKS
| F. v. Lamoen, Wave sequences
|
|
|
FORMULA
| Let v(4)=(1, 1, 1, 1), let M(4) be the 4 X 4 matrix m(i, j) =min(i, j); then a(n)= min ( v(4)*M(4)^n) - Benoit Cloitre (benoit7848c(AT)orange.fr), Oct 03 2002
GF=(1 - (-3 + q)*(-2 + q)*q)/((-1 + q)*(-1 + (-3 + q)^2*q)) - Wouter Meeussen, Mar 19 2005
|
|
|
PROG
| (PARI) k=4; M(k)=matrix(k, k, i, j, min(i, j)); v(k)=vector(k, i, 1); a(n)=vecmin(v(k)*M(k)^n)
|
|
|
CROSSREFS
| Sequence in context: A082144 A137971 A052604 * A086452 A091527 A201200
Adjacent sequences: A038222 A038223 A038224 * A038226 A038227 A038228
|
|
|
KEYWORD
| nonn,easy
|
|
|
AUTHOR
| Floor van Lamoen (fvlamoen(AT)hotmail.com)
|
|
|
EXTENSIONS
| More terms from David Wasserman (dwasserm(AT)earthlink.net), Feb 16 2002
|
| |
|
|
