1,8

Triangle begins:

1

1 1

1 1 1

1 2 1 1

1 3 2 1 1

1 4 3 2 1 1

1 5 5 3 2 1 1

1 7 7 5 3 2 1 1

1 8 10 7 5 3 2 1 1

1 10 13 11 7 5 3 2 1 1

1 12 18 15 11 7 5 3 2 1 1

1 14 23 21 15 11 7 5 3 2 1 1

1 16 30 28 22 15 11 7 5 3 2 1 1

1 19 37 38 30 22 15 11 7 5 3 2 1 1

1 21 47 49 41 30 22 15 11 7 5 3 2 1 1

1 24 57 65 54 42 30 22 15 11 7 5 3 2 1 1

1 27 70 82 73 56 42 30 22 15 11 7 5 3 2 1 1

1 30 84 105 94 76 56 42 30 22 15 11 7 5 3 2 1 1

1 33 101 131 123 99 77 56 42 30 22 15 11 7 5 3 2 1 1

1 37 119 164 157 131 101 77 56 42 30 22 15 11 7 5 3 2 1 1

Cf. A107379, A152140, A152146.

Row sums = A078408.

Sequence in context: A077481 A086290 A136568 this_sequence A039961 A108299 A065941

Adjacent sequences: A152154 A152155 A152156 this_sequence A152158 A152159 A152160

nonn,tabl

Richard Mathar (mathar(AT)strw.leidenuniv.nl), Sep 25 2009