80137

Appears in sequences

• Strong pseudoprimes to base 18.at n=28A020244
• Strong pseudoprimes to base 21.at n=20A020247
• Strong pseudoprimes to base 24.at n=22A020250
• Strong pseudoprimes to base 28.at n=20A020254
• Strong pseudoprimes to base 41.at n=29A020267
• Strong pseudoprimes to base 50.at n=24A020276
• Strong pseudoprimes to base 55.at n=22A020281
• Strong pseudoprimes to base 62.at n=33A020288
• Nested floor product of n and fractions (k+1)/k for all k>0 (mod 5), divided by 5.at n=24A073362
• Number of binary strings of length n with no substrings equal to 0000 0001 or 0011.at n=20A164408
• Number of compositions of n whose Lyndon and co-Lyndon factorizations both have the same length.at n=19A329394
• Semiprime 12-gonal numbers.at n=8A380069