19113

Appears in sequences

• Shallit sequence S(14,23), a(n)=[ a(n-1)^2/a(n-2)+1 ].at n=14A010923
• Numbers whose base-2 representation has exactly 13 runs.at n=19A043580
• Lucky numbers that are the sum of the first k primes for some k.at n=11A046286
• Sum of a(n) terms of 1/k^(7/8) first exceeds n.at n=20A056184
• a(n) = floor(surface area of a sphere with radius n).at n=38A066644
• a(n)=((-1)^n/2)*sum_{i1+i2+i3=2n} ((2*n)!/(i1! i2! i3!))*B(i1+i2) where B are the Bernoulli numbers.at n=6A124131
• A051838 gives numbers m such that the sum of first m primes divides the product of the first m primes. This sequence gives corresponding values of the sum of first m primes.at n=21A140763
• Numbers of the form prime(n)*(prime(n)-1)/4.at n=26A171555
• Lexicographically earliest sequence such that the sequence and its first and second differences share no terms, and the 3rd differences are equal to the original sequence.at n=13A202349
• Numbers generated by a Fibonacci-like sequence in which zeros are suppressed.at n=43A243063
• Number of length n+4 0..n arrays with no five consecutive elements with pattern ababa or abbba (possibly a=b) and new values 0..n introduced in 0..n order.at n=4A244176
• Number of length n+4 0..5 arrays with no five consecutive elements with pattern ababa or abbba (possibly a=b) and new values 0..5 introduced in 0..5 order.at n=4A244180
• T(n,k)=Number of length n+4 0..k arrays with no five consecutive elements with pattern ababa or abbba (possibly a=b) and new values 0..k introduced in 0..k order.at n=40A244185
• Terms of A007504 divisible by 3.at n=29A249679
• Number of steps required by the Hwang-Deutsch merging algorithm.at n=25A260795
• Numbers in A007504 such that omega(a(n)) = Omega(a(n)) = 3.at n=17A264885
• Number of nX6 0..1 arrays with every element unequal to 0, 2, 3 or 5 king-move adjacent elements, with upper left element zero.at n=9A304008
• Number of square twice-partitions of n.at n=30A306318
• Binomial transform of the continued fraction expansion of e.at n=13A306809
• Sum of the first n*(n+1) primes.at n=9A322420