A122795 Connell (5,3)-sum sequence (partial sums of the (5,3)-Connell sequence)

1, 3, 10, 22, 39, 57, 80, 108, 141, 179, 222, 270, 319, 373, 432, 496, 565, 639, 718, 802, 891, 985, 1080, 1180, 1285, 1395, 1510, 1630, 1755, 1885, 2020, 2160, 2305, 2455, 2610, 2766, 2927, 3093, 3264, 3440, 3621, 3807, 3998, 4194, 4395, 4601, 4812, 5028, 5249, 5475, 5706, 5938, 6175, 6417, 6664, 6916, 7173, 7435, 7702, 7974, 8251, 8533, 8820, 9112, 9409, 9711, 10018, 10330, 10647, 10969

Offset

1,2

Links

Table of n, a(n) for n=1..70.

Grady D. Bullington, The Connell Sum Sequence, J. Integer Seq. 10 (2007), Article 07.2.6. (includes direct formula for a(n))

Douglas E. Iannucci and Donna Mills-Taylor, On Generalizing the Connell Sequence, J. Integer Sequences, Vol. 2, 1999, #99.1.7.

Formula

a(n) = (n-th triangular number)-n+(n-th partial sum of A122798).

Crossrefs

Cf. A045929, A001614, A045928, A045930.

Cf. A122793, A122794, A122796, A122797, A122798, A122799, A122800.

Sequence in context: A174459 A326124 A346166 * A140066 A006503 A248851

Adjacent sequences: A122792 A122793 A122794 * A122796 A122797 A122798

Keyword

nonn,easy

Author

Grady Bullington (bullingt(AT)uwosh.edu), Sep 14 2006

Status

approved