A121712 Partial sums of A121711.

1, 3, 7, 15, 21, 31, 43, 54, 69, 74, 77, 86, 104, 118, 125, 141, 163, 183, 206, 227, 246, 259, 283, 309, 334, 364, 399, 427, 459, 493, 529, 567, 607, 649, 688, 740, 773, 800, 845, 891, 939, 983, 1024, 1074, 1117, 1171, 1227, 1285, 1345, 1407, 1462, 1511, 1562

Offset

1,2

Comments

GCD(a(n)+1,A121711(n+1)) > GCD(a(n),A121711(n+1)+1);

A121711(n) = a(n+1) - a(n).

Links

Table of n, a(n) for n=1..53.

Crossrefs

Sequence in context: A348943 A043725 A182247 * A175544 A373941 A139208

Adjacent sequences: A121709 A121710 A121711 * A121713 A121714 A121715

Keyword

nonn

Author

Reinhard Zumkeller, Aug 18 2006

Status

approved