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A296501 Decimal expansion of ratio-sum for A294552; see Comments. 2
6, 3, 5, 8, 6, 8, 5, 3, 1, 1, 1, 1, 1, 1, 9, 2, 3, 2, 1, 0, 0, 9, 7, 0, 1, 9, 7, 0, 0, 5, 7, 1, 5, 6, 4, 8, 3, 9, 3, 9, 4, 1, 4, 1, 1, 9, 4, 3, 6, 9, 0, 9, 1, 9, 3, 2, 6, 3, 4, 6, 3, 6, 9, 2, 2, 9, 5, 5, 1, 6, 1, 6, 1, 2, 7, 7, 9, 4, 6, 7, 8, 2, 7, 3, 1, 8 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Suppose that A = (a(n)), for n >= 0, is a sequence, and g is a real number such that a(n)/a(n-1) -> g. The ratio-sum for A is |a(1)/a(0) - g| + |a(2)/a(1) - g| + . . . , assuming that this series converges. For A = A294552, we have g = (1 + sqrt(5))/2, the golden ratio (A001622). See the guide at A296469 for related sequences.

LINKS

Table of n, a(n) for n=1..86.

EXAMPLE

6.358685311111192321009701970057156483939...

MATHEMATICA

a[0] = 1; a[1] = 2; b[0] = 3; b[1] = 4;

a[n_] := a[n] = a[n - 1] + a[n - 2] + b[n - 1] + b[n - 2] + n;

j = 1; While[j < 13, k = a[j] - j - 1;

While[k < a[j + 1] - j + 1, b[k] = j + k + 2; k++]; j++];

Table[a[n], {n, 0, k}]; (* A294552 *)

g = GoldenRatio; s = N[Sum[- g + a[n]/a[n - 1], {n, 1, 1000}], 200]

Take[RealDigits[s, 10][[1]], 100]  (* A296501 *)

CROSSREFS

Cf. A001622, A294552, A296469.

Sequence in context: A171030 A294386 A217769 * A296491 A085653 A022462

Adjacent sequences:  A296498 A296499 A296500 * A296502 A296503 A296504

KEYWORD

nonn,easy,cons

AUTHOR

Clark Kimberling, Dec 20 2017

STATUS

approved

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Last modified May 28 21:37 EDT 2020. Contains 334690 sequences. (Running on oeis4.)