a(n) = 6*a(n-1) + 2*2^(n-1) - 2 for n > 2, a(0) = a(1) = 0, a(2) = 3.

A240916

a(n) = 6*a(n-1) + 2*2^(n-1) - 2 for n > 2, a(0) = a(1) = 0, a(2) = 3.

Terms

    a(0) =0a(1) =0a(2) =3a(3) =24a(4) =158a(5) =978a(6) =5930a(7) =35706a(8) =214490a(9) =1287450a(10) =7725722a(11) =46356378a(12) =278142362a(13) =1668862362a(14) =10013190554a(15) =60079176090a(16) =360475122074

External references