I print indices1 like this
tensor([[[[  0,   2,   4,  …,  22,  24,  26],
[ 56,  58,  60,  …,  78,  80,  82],
[112, 114, 116,  …, 134, 136, 138],
…,
[616, 618, 620,  …, 638, 640, 642],
[672, 674, 676,  …, 694, 696, 698],
[728, 730, 732,  …, 750, 752, 754]],
     [[  0,   2,   4,  ...,  22,  24,  26],
      [ 56,  58,  60,  ...,  78,  80,  82],
      [112, 114, 116,  ..., 134, 136, 138],
      ...,
      [616, 618, 620,  ..., 638, 640, 642],
      [672, 674, 676,  ..., 694, 696, 698],
      [728, 730, 732,  ..., 750, 752, 754]],

     [[  0,   2,   4,  ...,  22,  24,  26],
      [ 56,  58,  60,  ...,  78,  80,  82],
      [112, 114, 116,  ..., 134, 136, 138],
      ...,
      [616, 618, 620,  ..., 638, 640, 642],
      [672, 674, 676,  ..., 694, 696, 698],
      [728, 730, 732,  ..., 750, 752, 754]],

     ...,

     [[  0,   2,   4,  ...,  22,  24,  26],
      [ 56,  58,  60,  ...,  78,  80,  82],
      [112, 114, 116,  ..., 134, 136, 138],
      ...,
      [616, 618, 620,  ..., 638, 640, 642],
      [672, 674, 676,  ..., 694, 696, 698],
      [728, 730, 732,  ..., 750, 752, 754]],

     [[  0,   2,   4,  ...,  22,  24,  26],
      [ 56,  58,  60,  ...,  78,  80,  82],
      [112, 114, 116,  ..., 134, 136, 138],
      ...,
      [616, 618, 620,  ..., 638, 640, 642],
      [672, 674, 676,  ..., 694, 696, 698],
      [728, 730, 732,  ..., 750, 752, 754]],

     [[  0,   2,   4,  ...,  22,  24,  26],
      [ 56,  58,  60,  ...,  78,  80,  82],
      [112, 114, 116,  ..., 134, 136, 138],
      ...,
      [616, 618, 620,  ..., 638, 640, 642],
      [672, 674, 676,  ..., 694, 696, 698],
      [728, 730, 732,  ..., 750, 752, 754]]],