cp's OEIS Frontend

a(11) = 110 from the basis {0 1 2 4 8 15 24 29 34 46 64}. a(12)<=138 from {0 1 2 4 19 30 37 42 50 58 64 74} or {0 1 2 7 12 22 37 40 54 63 67 71} or {0 2 4 18 26 34 49 54 55 61 64 74}, for example. a(13) <= 169 from {0 1 2 5 16 30 38 47 59 65 71 78 91} or {0 1 2 5 18 28 35 50 59 65 71 79 90}. a(14) <= 202 from {0 1 2 4 7 24 38 47 56 66 74 82 95 107}. a(15) <= 250 from {0 1 2 4 13 40 61 67 83 90 98 108 113 118 132}. - R. J. Mathar, Mar 17 2007

From Jon E. Schoenfield, Aug 24 2009: (Start)

Lexicographically first basis that yields a(n) for n = 2..13:

a(2) = 1 from {0 1}

a(3) = 3 from {0 1 2}

a(4) = 6 from {0 1 2 4}

a(5) = 11 from {0 1 2 4 7}

a(6) = 19 from {0 1 2 4 7 12}

a(7) = 31 from {0 1 2 4 8 13 18}

a(8) = 43 from {0 1 2 4 8 14 19 24}

a(9) = 63 from {0 1 2 4 8 15 24 29 34}

a(10) = 80 from {0 1 2 4 8 15 24 29 34 46}

a(11) = 110 from {0 1 2 4 8 15 24 29 34 46 64}

a(12) = 138 from {0 1 2 4 19 30 37 42 50 58 64 74}

a(13) = 169 from {0 1 2 5 16 30 38 47 59 65 71 78 91}

(End)

From Lars Blomberg, Oct 31 2015: (Start)

Lexicographically first basis that yields a(n) for n=14..16:

a(14) = 202 from {0,1,2,4,7,24,38,47,56,66,74,82,95,107}

a(15) = 241 from {0,1,2,22,26,36,43,50,82,90,95,98,101,113,128}

a(16) = 288 from {0,4,5,10,31,43,55,58,92,100,111,120,122,129,136,152}

(End)

Lexicographically first basis that yields a(17) = 330 is {0,5,9,10,11,43,62,75,88,112,115,129,136,143,151,159,171}. - Fausto A. C. Cariboni, Oct 24 2017