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A110883
Sum of consecutive digits in the decimal expansion of Pi.
2
4, 5, 5, 6, 14, 11, 8, 11, 8, 8, 13, 17, 16, 16, 12, 5, 5, 11, 12, 10, 8, 8, 10, 7, 6, 11, 11, 5, 9, 16, 14, 5, 2, 10, 16, 12, 5, 10, 16, 8, 7, 15, 12, 12, 18, 12, 10, 12, 6, 1, 5, 13, 10, 2, 9, 16, 11, 13, 13, 8, 9, 14, 11, 5, 3, 7, 15, 9, 7, 10, 4, 6, 8, 10, 14, 8, 2, 8, 17, 18, 17, 14, 8
OFFSET
1,1
LINKS
B. Deal, Home Page.
A. Frank and P. Jacqueroux, International Contest, 2001. Item 25.
FORMULA
a(n) = p(n) + p(n+1) where p(n) is the n-th digit of Pi (see sequence A000796).
a(n) = A000796(n) + A000796(n+1).
EXAMPLE
a(1)=3+1 = 4, a(2)=1+4 = 5, a(3)=4+1 = 5, a(4)=1+5 = 6, a(5)=5+9 = 14
MATHEMATICA
listlength = 100; Table[IntegerDigits[IntegerPart[10^listlength Pi]][[i]] + IntegerDigits[IntegerPart[10^listlength (Pi - 3.0`100)]][[i]], {i, 1, listlength}]
CROSSREFS
Cf. A000796.
Sequence in context: A374830 A028276 A316150 * A178131 A071570 A336047
KEYWORD
base,nonn
AUTHOR
Blaine J. Deal and Mark Nandor, Sep 19 2005
EXTENSIONS
Typo in formula fixed by Zak Seidov, Jan 02 2014
STATUS
approved