J. Volkmar Schmidt has authored 3 sequences.
A366831
Self-locating strings within Pi: numbers n such that the reverse string n starts at position n in the decimal digits of Pi, where leading 3 is omitted.
Original entry on oeis.org
1, 50, 576, 242424, 746074, 10311073, 54848721, 103849853, 48438192357
Offset: 1
50 is a term because '05' starts at position 50,
576 is a term because '675' starts at position 576:
Position 1 2 3 ... 50 51 ... 576 577 578 ...
Pi (3 omitted) 1 4 1 ... 0 5 ... 6 7 5 ...
A366830
Self-locating strings within Pi: numbers n such that the reverse string n starts at position n in the decimal digits of Pi, where 3 is the first digit.
Original entry on oeis.org
5, 1610, 5833, 82699856, 9633661255, 17292288245, 78246420246
Offset: 1
1610 is a term because '0161' starts at position 1610:
Position 1 2 3 4 ... 1610 1611 1612 1613 ...
Pi 3 1 4 1 ... 0 1 6 1 ...
A366829
Number of 9-step self-avoiding king's tours on an n X n board summed over all starting positions.
Original entry on oeis.org
0, 0, 784, 436984, 3908376, 13530576, 30543072, 54738536, 85743256, 123447704, 167851880, 218955784, 276759416, 341262776, 412465864, 490368680, 574971224, 666273496, 764275496, 868977224, 980378680, 1098479864, 1223280776, 1354781416, 1492981784, 1637881880
Offset: 1
Some solutions for 3 X 3:
1 2 3 1 2 3 1 2 3 1 2 3 1 7 8 1 2 8
4 5 6 6 5 4 8 9 4 7 6 4 6 2 9 3 7 9
7 8 9 7 8 9 7 6 5 8 9 5 5 4 3 4 5 6
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