This site is supported by donations to The OEIS Foundation.

# OEIS format for decimal representation of constants

From OeisWiki

The value of the constant encoded as a sequence of decimal digits is:

Generally, the offset is the number of digits before the decimal point:

e.g.:

- for Pi = 3.14159... it is offset = 1,
- for gamma = 0.5772... it is offset = 0,
- for sin(1°) = 0.01745... it is also offset = 0,
- for alpha = 0.007297... it is again offset = 0 and
- for 1/alpha = 137.0359... it is offset = 3.

But if the number of initial zeros would be too large to reasonably include, it can be encoded as a negative offset, as A143531, which has offset -14827:

- 1, 8, 2, 8, 6, 4, 3, 2, ...

If the number of initial zeros is too large (in absolute value) to be recorded as the offset at all, like A160106, give the offset as 1 and record the proper offset (if possible) as a comment.

## Examples

- Cf. Talk:OEIS format for decimal representation of constants#Offset for the following:

16.789 has offset 2 1.67 has offset 1 .678 has offset 0 .0678 has offset -1 .00678 has offset -2

According to these above examples, we could have

- for sin(1°) = 0.01745... offset = -1 instead of offset = 0,
- for alpha = 0.007297... offset = -2 instead of offset = 0,

but we don't because the initial 0's are included in those sequences.