a(n) = rightmost term in M^n * [1,1,1], where M = a 3 X 3 matrix composed of the first 3 rows of A050166 (fill in the matrix with zeros): = [1 0 0 / 1 2 0 / 1 4 5].
A093953
a(n) = rightmost term in M^n * [1,1,1], where M = a 3 X 3 matrix composed of the first 3 rows of A050166 (fill in the matrix with zeros): = [1 0 0 / 1 2 0 / 1 4 5].
Terms
- a(0) =1a(1) =10a(2) =63a(3) =344a(4) =1781a(5) =9030a(6) =45403a(7) =227524a(8) =1138641a(9) =5695250a(10) =28480343a(11) =142409904a(12) =712065901a(13) =3560362270a(14) =17801876883a(15) =89009515484a(16) =445047839561
External references
- oeis: A093953