|
| |
|
|
A086639
|
|
Write decimal expansion of Pi in triangular form; sequence gives left edge.
|
|
3
| |
|
|
3, 1, 1, 2, 5, 3, 2, 2, 4, 9, 9, 7, 8, 3, 8, 7, 2, 1, 8, 9, 5, 3, 6, 6, 3, 5, 7, 6, 2, 2, 9, 9, 4, 0, 4, 2, 3, 0, 4, 1, 6, 7, 8, 9, 9, 1, 2, 3, 0, 1, 7, 2, 2, 4, 7, 8, 3, 1, 8, 3, 0, 2, 7, 9, 1, 6, 2, 2, 6, 7, 6, 8, 1, 5, 7, 3, 7, 7, 2, 4, 9, 3, 2, 1, 9, 8, 9, 1, 2, 7, 7, 9, 4, 0, 9, 2, 9, 8, 4, 9, 9, 2, 0, 7, 0
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,1
|
|
|
FORMULA
| a(n)=A000796(1-n(n-1)/2). - M. F. Hasler, Oct 20 2011
|
|
|
EXAMPLE
| Triangle is
3
14
159
2653
58979
323846
2643383
27950288
419716939
9375105820
|
|
|
MATHEMATICA
| pi = RealDigits[Pi, 10, 5461][[1]]; Table[ pi[[n(n + 1)/2 + 1]], {n, 0, 104}]
|
|
|
CROSSREFS
| Cf. A000796, A083437.
Sequence in context: A078712 A035254 A143934 * A204165 A200702 A016564
Adjacent sequences: A086636 A086637 A086638 * A086640 A086641 A086642
|
|
|
KEYWORD
| easy,nonn,base
|
|
|
AUTHOR
| Cino Hilliard (hillcino368(AT)gmail.com), Jul 24 2003
|
|
|
EXTENSIONS
| Edited by Robert G. Wilson v (rgwv(AT)rgwv.com), Jul 26 2003
|
| |
|
|
