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A131912 Row sums of triangle A131911. 1
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 (list; graph; refs; listen; history; text; internal format)
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: A092094 A064665 A142337 * A247159 A022953 A030714

Adjacent sequences:  A131909 A131910 A131911 * A131913 A131914 A131915

KEYWORD

nonn

AUTHOR

Gary W. Adamson, Jul 27 2007

STATUS

approved

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Last modified January 18 00:56 EST 2022. Contains 350410 sequences. (Running on oeis4.)