A068516 Number of squares (of another matrix) in the group GL(2,Z_n) described in sequence A000252.

3, 16, 16, 162, 48, 696, 104, 1236, 486, 4680, 256, 9366, 2088, 2592, 1342, 28296, 3708, 44640, 2592, 11136, 14040, 97416, 1664, 100410, 28098, 99936, 11136, 250110, 7776, 327840, 20924, 74880, 84888, 112752, 19776, 671346, 133920, 149856, 16848

Offset: 2

Author

Sharon Sela (sharonsela(AT)hotmail.com), Mar 19 2002

Keywords

• nonn
• mult

Comments

The sequence is multiplicative. This is the 2-dimensional analog of A046073.

Crossrefs

Cf. A000252, A046073, A068197.

Extensions

Terms a(21) and beyond from Andrey Zabolotskiy, Jul 02 2022