33679

Properties

Appears in sequences

• Triangle T(n,d) (listed row-wise: T(1,1)=1, T(2,1)=1, T(2,2)=1, T(3,1)=2, T(3,2)=2, T(3,3)=1, ...) giving the number of n-edge general plane trees with root degree d that are fixed by the six-fold application of Catalan Automorphisms A057511/A057512 (Deep rotation of general parenthesizations/plane trees).at n=66A079222
• Number of Catalan objects fixed by six-fold application of the Catalan bijections A057511/A057512 (Deep rotation of general parenthesizations/plane trees).at n=11A079227
• Prime numbers with gaps larger than 18 towards both neighboring primes.at n=20A163111
• Prime numbers with gaps larger than 20 towards both neighboring primes.at n=8A163112
• Primes whose base-7 representation also is the base-3 representation of a prime.at n=29A235470
• Primes p such that b=2*p+1 is semiprime, c=2*b+1 is 3-almost prime and d=2*c+1 is 4-almost prime.at n=29A235646
• Number of odd singletons in all partitions of n (n>=0).at n=38A265257
• Sums of antidiagonals of A321960.at n=9A321958
• Primes P where the distance to the nearest prime is greater than 2*log(P).at n=23A330426
• Prime numbersat n=3608