A330709 Two-column table read by rows: pairs (i,j) in order sorted from the left.

0, 0, 1, 0, 1, 1, 2, 0, 2, 1, 2, 2, 3, 0, 3, 1, 3, 2, 3, 3, 4, 0, 4, 1, 4, 2, 4, 3, 4, 4, 5, 0, 5, 1, 5, 2, 5, 3, 5, 4, 5, 5, 6, 0, 6, 1, 6, 2, 6, 3, 6, 4, 6, 5, 6, 6, 7, 0, 7, 1, 7, 2, 7, 3, 7, 4, 7, 5, 7, 6, 7, 7, 8, 0, 8, 1, 8, 2, 8, 3, 8, 4, 8, 5, 8, 6, 8, 7, 8, 8, 9, 0, 9, 1, 9, 2, 9, 3, 9, 4, 9, 5, 9, 6, 9, 7, 9, 8, 9, 9, 10, 0

Offset

0,7

Links

Mehmet A. Ates, Table of n, a(n) for n = 0..1500

Mathematica

TwoDVectors = List[];
SeqSize = 20;
For[i = 0, i <= SeqSize, i++,
  For[j = 0, j <= i, j++,
    AppendTo[TwoDVectors, {i, j}]
  ]
];
Flatten[TwoDVectors]

Crossrefs

a(2n)= A003056(n),

a(2n+1)= A002262(n).

Cf. A331195.

Sequence in context: A153149 A249072 A174007 * A045450 A347419 A029222

Adjacent sequences: A330706 A330707 A330708 * A330710 A330711 A330712

Keyword

nonn,easy

Author

Mehmet A. Ates, Jun 08 2020

Status

approved