A131912 Row sums of triangle A131911.

1, 7, 12, 18, 23, 29, 34, 40, 45, 51, 56, 62, 67, 73, 78, 84, 89, 95, 100, 106, 111, 117, 122, 128, 133, 139, 144, 150, 155, 161, 166, 172, 177, 183, 188, 194, 199, 205, 210, 216, 221, 227, 232, 238, 243, 249, 254, 260, 265, 271, 276, 282, 287, 293, 298

Offset

1,2

Links

Table of n, a(n) for n=1..55.

Formula

Binomial transform of (1, 6, -1, 2, -4, 8, -16, ...).

a(n) = 11*n - a(n-1) - 14 (with a(1)=1). - Vincenzo Librandi, Nov 23 2010

Example

a(4) = 18 = sum of row 4 terms, triangle A131911: (8 + 1 + 2 + 7).
a(4) = 18 = (1, 3, 3, 1) dot (1, 6, -1, 2) = (1 + 18 -3, 2).

Crossrefs

Cf. A131911.

Sequence in context: A064665 A369357 A142337 * A247159 A022953 A030714

Adjacent sequences: A131909 A131910 A131911 * A131913 A131914 A131915

Keyword

nonn

Author

Gary W. Adamson, Jul 27 2007

Status

approved