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A105100 Sum of ordered 3 prime sided prime triangles. 1
41, 156, 304, 462, 630, 834, 1020, 1214, 1420, 1618, 1824, 2076, 2288, 2514, 2712, 2926, 3198, 3460, 3656, 3874, 4086, 4370, 4598, 4888, 5100, 5346, 5626, 5886, 6126, 6332, 6580, 6836, 7146, 7386, 7678, 7848, 8208, 8560, 8762, 8962, 9258, 9498, 9696 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

An ordered 3 prime sided prime triangle is 6 consecutive primes arranged in an equilateral triangle of the form

...........p(6n-5)

.....p(6n-4).....p(6n-3)

.p(6n-2)...p(6n-1)......p(6n)

LINKS

Table of n, a(n) for n=1..43.

EXAMPLE

The first 3 prime sided prime triangle

2

3 5

7 11 13

adds up to 41, the first entry.

PROG

(PARI) sumtri3x3(n) = { local(x, j, s); forstep(x=1, n, 6, s = prime(x)+prime(x+1)+prime(x+2)+prime(x+3)+prime(x+4)+prime(x+5); print1(s", ") ) }

CROSSREFS

Sequence in context: A259835 A082252 A221811 * A141988 A347075 A158602

Adjacent sequences:  A105097 A105098 A105099 * A105101 A105102 A105103

KEYWORD

easy,nonn

AUTHOR

Cino Hilliard, Apr 07 2005

STATUS

approved

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Last modified September 25 13:31 EDT 2021. Contains 347654 sequences. (Running on oeis4.)