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A100543
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Sum of first n terms of A_n (signed values).
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1
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1, 3, 3, 0, 10, 12, 1, 24, 25, 32, 116, 12, 412, 109, 126, 2389, 12497, 28772, 126, 72795, 247786, 770213, 159378001963452599312, 2169128, -26, 311, 378, 789, 10015050, 75, 74253544, 7881195, 2461717833658872781238383813854943728
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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COMMENTS
| Since the sequences in the OEIS occasionally change their initial terms (for editorial reasons), this is an especially ill-defined sequence! - N. J. A. Sloane (njas(AT)research.att.com), Jan 01 2005
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EXAMPLE
| A000001 (Number of groups of order n) begins 1,... -> a(1)= 1
A000002 (Kolakoski sequence) begins 1,2,... -> a(2)= 3
A000003 begins 1,1,1,... -> a(3)= 3
A000004 (The zero sequence) begins 0,0,0,0,... -> a(4)= 0
A000005 (The number of divisors) begins 1,2,2,3,2,... -> a(5)=10
...........
A000009 begins 1,1,2,2,4,2,6,4,6,... so a(9) = 1+1+2+2+4+2+6+4+6 = 28.
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CROSSREFS
| Cf. A031135, A031214, A039928, A100544.
Sequence in context: A200701 A169670 A120981 * A039928 A137259 A166553
Adjacent sequences: A100540 A100541 A100542 * A100544 A100545 A100546
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KEYWORD
| dumb,easy,sign
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AUTHOR
| Russ Cox (rsc(AT)swtch.com)
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EXTENSIONS
| Corrected and extended by C. Ronaldo (aga_new_ac(AT)hotmail.com), Dec 27 2004
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