22992

Appears in sequences

• Riordan array (-sqrt(4*x^2+8*x+1)+2*x+2, (sqrt(4*x^2+8*x+1)-2*x-1)/2).at n=29A121575
• Riordan array (2-2*x-sqrt(1-8*x+4*x^2), (1-2*x-sqrt(1-8*x+4*x^2))/2).at n=29A121576
• Number of 3 X 3 magilatin squares with positive values and magic sum n.at n=20A173549
• Irregular triangle read by rows: T(n,k) (n >= 2) is the number of cubic graphs on 2n nodes with diameter k.at n=38A204329
• Numbers with digits 2 and 9 only.at n=36A284923
• G.f. A(x) satisfies A(x) = 1 / (1 - x * A(x^6)).at n=44A367637