A296222 Decimal expansion of the limiting ratio of terms in A296221.

3, 6, 5, 1, 1, 1, 9, 4, 2, 2, 2, 3, 8, 0, 3, 4, 7, 5, 8, 6, 4, 0, 5, 0, 0, 5, 1, 9, 7, 9, 2, 7, 3, 1, 3, 8, 8, 9, 8, 5, 2, 8, 9, 7, 5, 8, 3, 6, 3, 3, 5, 4, 0, 1, 5, 3, 1, 6, 7, 9, 4, 8, 7, 3, 9, 5, 9, 6, 9, 0, 3, 2, 6, 0, 2, 0, 8, 4, 2, 4, 0, 5, 4, 2, 8, 9

Offset: 1

Author

Clark Kimberling, Dec 09 2017

Keywords

• nonn
• easy
• cons

Comments

See A296000 for a guide to related sequences and limiting ratios.

Examples

			A296221(n)/A296221(n-1) -> 3.651119422238034...
		

Crossrefs

Cf. A296000, A296221.

Programs

Mathematica

mex[list_] := NestWhile[# + 1 &, 1, MemberQ[list, #] &];
a[0] = 1; a[1] = 3; b[0] = 2;
a[n_] := a[n] = Sum[a[k]*b[n - k - 1], {k, 0, n - 1}] + 1;
b[n_] := b[n] = mex[Flatten[Table[Join[{a[n]}, {a[i], b[i]}], {i, 0, n - 1}]]];
u = Table[a[n], {n, 0, 200}];  (* A296221 *)
Table[b[n], {n, 0, 20}]
N[Table[a[n]/a[n - 1], {n, 1, 200, 10}], 200];
RealDigits[Last[t], 10][[1]] (* A296222 *)