70669

Appears in sequences

• Expansion of g.f. x*(1+x+2*x^2+2*x^3+5*x^4+5*x^5-3*x^6+2*x^7-x^8-x^9)/(1-6*x^6-x^12).at n=38A116559
• Number of arrays of 4 integers in -n..n with sum zero and equal numbers of elements greater than zero and less than zero.at n=25A201812
• Number of (n+4) X 10 0..2 matrices with each 5 X 5 subblock idempotent.at n=8A224623
• a(n) = 6*a(n-2) + a(n-4), where a(0) = 2, a(1) = 8, a(2) = 13, a(3) = 49.at n=11A228469
• a(n) = 6*a(n-2) + a(n-4), where a(0) = 5, a(1) = 8, a(2) = 30, a(3) = 49.at n=11A228472
• Number of (n+1) X (4+1) arrays of permutations of 0..n*5+4 with each element having index change +-(.,.) 0,0 0,1 or 1,2.at n=2A264337
• T(n,k)=Number of (n+1)X(k+1) arrays of permutations of 0..(n+1)*(k+1)-1 with each element having index change +-(.,.) 0,0 0,1 or 1,2.at n=17A264341
• Number of (3+1) X (n+1) arrays of permutations of 0..n*4+3 with each element having index change +-(.,.) 0,0 0,1 or 1,2.at n=3A264343
• Numerators of continued fraction convergents to sqrt(10)/2 = sqrt(5/2) = A020797 + 1.at n=18A295333