OFFSET
2,3
COMMENTS
With offset 4 number of compositions of n, where the difference between the number of odd parts and the number of even parts is -2.
LINKS
Alois P. Heinz, Table of n, a(n) for n = 2..1000
FORMULA
Recurrence (for n>=6): (n+4)*(2*n-5)*(2*n-3)*(n^4 - 6*n^3 + 11*n^2 - 6*n - 16)*a(n) = -16*(n-3)*(n+3)*(2*n-5)*(2*n-1)*a(n-1) + 2*(n-2)*(2*n-3)*(2*n^5 - 7*n^4 + 8*n^3 - 51*n^2 + 28*n + 32)*a(n-2) + 2*(n-3)*(2*n-5)*(2*n-1)*(2*n^4 - 3*n^3 - 2*n^2 + 11*n - 24)*a(n-3) - (n-4)*(2*n-3)*(2*n-1)*(n^4 - 2*n^3 - n^2 + 2*n - 16)*a(n-4). - Vaclav Kotesovec, May 20 2014
CROSSREFS
KEYWORD
nonn
AUTHOR
Alois P. Heinz, May 16 2014
STATUS
approved