26101

Appears in sequences

• Concatenate n with n-th prime.at n=25A045532
• Odd composite numbers which in base 2 contain their largest proper factor as a substring of digits.at n=33A063131
• Composite numbers not divisible by 2, 3, 5 or 7 which in base 2 contain their largest proper factor as a substring.at n=27A063138
• Composite numbers not divisible by 2 which in base 4 contain their largest proper factor as a substring.at n=11A063145
• a(n) = n^3 - n^2 + 1.at n=30A100104
• Numbers k such that k and k^2 use only the digits 0, 1, 2, 6 and 8.at n=27A136829
• a(n) = 900*n + 1.at n=28A158407
• Semiprimes p such that next semiprime after p is p+20.at n=5A217335
• Composite numbers coprime to 6 such that A179382(n) = A000265(n-1), the odd part of n-1.at n=44A225913
• Number of nondecreasing -3..3 vectors of length n whose dot product with some lexicographically greater or equal nondecreasing -3..3 vector equals n.at n=12A226417
• MM-numbers of crossing set partitions.at n=30A324324
• a(n) is the smallest positive composite that cannot be expressed as the sum of any subset of earlier terms and is not a multiple of any earlier term.at n=20A330071
• A335695(n) + A335696(n) + A335697(n).at n=12A335698
• Numbers k such that k, k+1, k+2, k+3 have 2, 3, 4, 5 prime factors respectively, counted with multiplicity.at n=34A363391
• Squarefree semiprimes k such that k+1 is the product of three distinct primes and k+2 is the product of four distinct primes.at n=38A376352
• Expansion of (1/x) * Series_Reversion( x / ((1+x)^5 + x^2) ).at n=5A388532