22139

Appears in sequences

• From George Gilbert's marks problem: jumping 4 marks at a time (initial positions).at n=20A019595
• Numbers k that divide 10^k + 3^k.at n=5A045589
• Numbers that are the product of 3 prime factors whose concatenation is a palindrome.at n=39A046452
• Numerators of the continued fraction convergents of the decimal concatenation of the prime-indexed primes.at n=14A128850
• Retrograde trajectory of 13 under map n -> A132948(n).at n=36A132947
• Numerator of A166100(A166101(n))/A166102(n).at n=33A166272
• a(n) = n^2 + a(n-1), with a(1)=0.at n=39A168559
• Sum of squares of numbers less than n that do not divide n.at n=40A276984
• Numbers k such that (142*10^k - 7)/9 is prime.at n=19A282256
• Nonsquarefree numbers k such that A003415(k) divides A276086(k), where A003415 is the arithmetic derivative, and A276086 is the primorial base exp-function.at n=37A371085