A260315 Decimal expansion of the generating constant c of A139244.

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

Offset

1,2

Comments

A139244(n-1) = ceiling(c^(2^n)).

The digit 4 appears for the first time only at position n=53, making it the last one to appear in the sequence.

Links

Table of n, a(n) for n=1..74.

A. V. Aho and N. J. A. Sloane, Some doubly exponential sequences, Fibonacci Quarterly, Vol. 11, No. 4 (1973), pp. 429-437.

A. V. Aho and N. J. A. Sloane, Some doubly exponential sequences, Fibonacci Quarterly, Vol. 11, No. 4 (1973), pp. 429-437 (original plus references that F.Q. forgot to include - see last page!)

Example

1.96689176179017636533350572... .

Crossrefs

Cf. A139244.

Sequence in context: A309822 A195365 A092513 * A378485 A242713 A155129

Adjacent sequences: A260312 A260313 A260314 * A260316 A260317 A260318

Keyword

nonn,cons,changed

Author

Chayim Lowen, Jul 22 2015

Status

approved