19694

Appears in sequences

• Sum of 12 positive 9th powers.at n=13A004801
• Numbers k such that 6*p(k)*p(k+1)*p(k+2)*p(k+3)*p(k+4)-1 and 6*p(k)*p(k+1)*p(k+2)*p(k+3)*p(k+4)+1 are twin primes with p(h) = h-th prime.at n=39A129310
• Number of (n+1)X(2+1) 0..3 arrays with the upper median plus the lower median minus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one.at n=1A237932
• T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the upper median plus the lower median minus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one.at n=4A237936
• a(n) = a(n-1) + 2*a(n-2) + 8*Fibonacci(n) + 2*Fibonacci(n-1); a(1) = 4, a(2) = 14.at n=10A291675
• Number of nX7 0..1 arrays with every element equal to 0, 2, 3 or 6 king-move adjacent elements, with upper left element zero.at n=11A297985
• Number of series-reduced rooted trees whose leaves are sets (not necessarily disjoint) with multiset union a strongly normal multiset of size n.at n=6A330625
• a(n) is the start of the least run of exactly n consecutive positive integers with the same value of A071626, or -1 if no such run exists.at n=50A357386
• Length of iteration sequence of shortest unimodal Collatz (3x+1)/2 sequence that begins with exactly n increases and ends with continuous decreases until reaching 1.at n=9A381705