OFFSET
1,2
LINKS
D. Callan, T. Mansour, Enumeration of small Wilf classes avoiding 1324 and two other 4-letter patterns, arXiv:1705.00933 (2017), Table 2 No 70.
Lara Pudwell, Systematic Studies in Pattern Avoidance, 2005.
Index entries for linear recurrences with constant coefficients, signature (11,-52,138,-225,231,-146,52,-8).
FORMULA
G.f.: A(x) = -{x(8x^7-41x^6+84x^5-103x^4+79x^3-36x^2+9x-1)}/{(2x-1)^3(x-1)^5}
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Lara Pudwell, Feb 26 2006
STATUS
approved