42127
domain: N
Appears in sequences
- Strong pseudoprimes to base 17.at n=24A020243
- Strong pseudoprimes to base 20.at n=16A020246
- Strong pseudoprimes to base 24.at n=17A020250
- Strong pseudoprimes to base 25.at n=27A020251
- Strong pseudoprimes to base 30.at n=22A020256
- Strong pseudoprimes to base 36.at n=34A020262
- Strong pseudoprimes to base 45.at n=12A020271
- Strong pseudoprimes to base 54.at n=22A020280
- Strong pseudoprimes to base 82.at n=26A020308
- Strong pseudoprimes to base 83.at n=18A020309
- Strong pseudoprimes to base 98.at n=29A020324
- 10-gonal (or decagonal) numbers with prime indices.at n=26A267217
- Number of integers in n-th generation of tree T(-3/4) defined in Comments.at n=47A274151
- Numbers k such that 3^(k-1) == 2^(k-1) !== 1 (mod k).at n=37A285300
- Intersection of A099011 and A327651.at n=25A327652
- NSW pseudoprimes: odd composite numbers k such that A002315((k-1)/2) == 1 (mod k).at n=30A330276
- Composite terms in A270951.at n=36A351337