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A122820 Array read by rows in which n-th row contains n successive primes with least sum divisible by n. 3
2, 3, 5, 3, 5, 7, 5, 7, 11, 13, 71, 73, 79, 83, 89, 5, 7, 11, 13, 17, 19, 7, 11, 13, 17, 19, 23, 29, 17, 19, 23, 29, 31, 37, 41, 43, 239, 241, 251, 257, 263, 269, 271, 277, 281, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 5, 7, 11, 13, 17 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..71.

EXAMPLE

Triangle begins:

2

3 5

3 5 7

5 7 11 13

71 73 79 83 89

5 7 11 13 17 19

7 11 13 17 19 23 29

17 19 23 29 31 37 41 43

239 241 251 257 263 269 271 277 281

13 17 19 23 29 31 37 41 43 47

29 31 37 41 43 47 53 59 61 67 71

5 7 11 13 17 19 23 29 31 37 41 43

MATHEMATICA

f[n_] := Block[{k = 1, t}, While[t = Table[Prime[i], {i, k, k + n - 1}]; Mod[Plus @@ t, n] > 0, k++ ]; t]; Flatten[Table[f[n], {n, 12}]]

CROSSREFS

Cf. A054892 (first term of each row), A077388 (row sum), A077389 (row average).

Cf. A082592, A082596, A082638, A082653, A082661.

Sequence in context: A073684 A179295 A083776 * A261324 A224887 A151571

Adjacent sequences:  A122817 A122818 A122819 * A122821 A122822 A122823

KEYWORD

nonn,tabl

AUTHOR

Ray Chandler, Sep 27 2006

STATUS

approved

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Last modified November 13 10:29 EST 2019. Contains 329093 sequences. (Running on oeis4.)