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A101105 Row sums of triangle A101224, which is related to the Flavius sieve (A000960). +0
2
1, 5, 18, 44, 90, 167, 257, 397, 596, 782, 1079, 1404, 1793, 2226, 2813, 3337, 4110, 4848, 5632, 6671, 7773, 8861, 10160, 11792, 13046, 14846, 16653, 18494, 20678, 22985, 25064, 27828, 30431, 33181, 36384, 39617, 42795, 46650, 50873, 54438 (list; graph; listen)
OFFSET

1,2

PROGRAM

(PARI) {a(n)=local(A); sum(k=1, n, if(k==1, A=n^2-n+1, A=(n-k+1)*floor((A-1)/(n-k+1))))}

CROSSREFS

Cf. A101224.

Sequence in context: A007742 A000338 A056640 this_sequence A037140 A007237 A000339

Adjacent sequences: A101102 A101103 A101104 this_sequence A101106 A101107 A101108

KEYWORD

nonn

AUTHOR

Paul D. Hanna (pauldhanna(AT)juno.com), Dec 01 2004

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.


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