a(n) = 20 * a(n-1) - 90 * a(n-2) for n>1, with a(0)=0, a(1)=1.

A361293

a(n) = 20 * a(n-1) - 90 * a(n-2) for n>1, with a(0)=0, a(1)=1.

Terms

    a(0) =0a(1) =1a(2) =20a(3) =310a(4) =4400a(5) =60100a(6) =806000a(7) =10711000a(8) =141680000a(9) =1869610000a(10) =24641000000a(11) =324555100000

External references