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A131425 Row sums of triangle A131424. 2
1, 5, 16, 33, 68, 101, 156, 205, 280, 389, 468, 605, 732, 841, 988, 1181, 1392, 1545, 1784, 1999, 2182, 2463, 2714, 3027, 3410, 3709, 3964, 4283, 4554, 4893, 5564, 5947, 6410, 6751, 7386, 7755, 8282, 8827, 9310, 9887, 10482, 10923, 11722, 12191, 12758, 13243 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Andrew Howroyd, Table of n, a(n) for n = 1..1000

FORMULA

a(n) = n*(prime(n) - 3) + Sum_{k=1..n} prime(k). - Andrew Howroyd, Aug 28 2018

EXAMPLE

a(4) = 33 = sum of row 4 terms of triangle A131424: (6 + 7 + 9 + 11).

PROG

(PARI) a(n)={n*(prime(n) - 3) + sum(k=1, n, prime(k))} \\ Andrew Howroyd, Aug 28 2018

CROSSREFS

Cf. A131424, A131426, A127640, A000040.

Sequence in context: A038361 A227719 A172166 * A227720 A096941 A246697

Adjacent sequences:  A131422 A131423 A131424 * A131426 A131427 A131428

KEYWORD

nonn

AUTHOR

Gary W. Adamson, Jul 10 2007

EXTENSIONS

Terms a(10) and beyond from Andrew Howroyd, Aug 28 2018

STATUS

approved

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Last modified September 21 13:00 EDT 2020. Contains 337272 sequences. (Running on oeis4.)