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+--- Forum: General Software Library (/forum-13.html)
+--- Thread: (49G) OEIS A131421: (A000012 * A127775) + (A127775 * A000012) - A000012 (/thread-9235.html)
(49G) OEIS A131421: (A000012 * A127775) + (A127775 * A000012) - A000012 - Gerald H - 10-06-2017 01:56 PM
For natural number input N the programme returns the Nth element of the sequence
https://oeis.org/A131421
where you'll notice that the description of the sequence
(A000012 * A127775) + (A127775 * A000012) - A000012
indicates that the author's descriptive powers failed her, although she clearly maintained a sense of humour.
Any more refined attempts at verbally describing the sequence?
I recommend you replace
FPTR2 ^ZSQRT
with
http://www.hpmuseum.org/forum/thread-3837.html
as the built in function errs for larger input & is also slower.
Size: 180.5
CkSum: # 9E6Eh
Code:
::
CK1&Dispatch
# FF
::
ZINT 0
ZINT 0
ROTDUP
FPTR2 ^ZSQRT
DROP
DUP
ZINT 4
FPTR2 ^ZQUOText
FPTR2 ^RADDext
BEGIN
ZINT 1
FPTR2 ^RADDext
DUPDUP
DUP
FPTR2 ^RMULText
FPTR2 ^SWAPRSUB
ZINT 2
FPTR2 ^ZQUOText
ZINT 1
FPTR2 ^RADDext
DUP
4PICK
Z<=
WHILE
::
5ROLLDROP
4ROLLDROP
OVER
4UNROLL
4UNROLL
;
REPEAT
2DROP
FPTR2 ^RADDext
FPTR2 ^SWAPRSUB
DUP
FPTR2 ^RADDext
ZINT 1
FPTR2 ^RSUBext
;
;