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
Keywords
Examples
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.
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