70843

Properties

Appears in sequences

• a(0)=a(1)=3; thereafter a(n) = a(n-1) + a(n-2) + 1.at n=21A022403
• a(0)=3, a(1)=7; thereafter a(n) = a(n-1) + a(n-2) + 1.at n=20A022406
• Primes p of the form 4m+3 for which there are exactly as many primitive roots modulo p in the interval [0,p/2] as in the interval [p/2,p].at n=36A172490
• Numbers that have 11 terms in their Zeckendorf representation.at n=32A179251
• Sum over all partitions of n of the number of distinct parts i of multiplicity i.at n=49A276428
• Array read by upwards antidiagonals: T(m,n) = number of set partitions into distinct parts of the multiset consisting of one copy each of x_1, x_2, ..., x_m, and two copies each of y_1, y_2, ..., y_n, for m >= 0, n >= 0.at n=32A322770
• Number of partitions of the (n+4)-multiset {1,2,...,n,1,2,3,4} into distinct multisets.at n=7A346897
• Number of partitions of the (n+7)-multiset {1,2,...,n,1,2,...,7} into distinct multisets.at n=4A346900
• a(0)=1, a(1)=3, a(2)=7; thereafter a(n) = a(n-1) + a(n-2) + 1.at n=21A355288
• Prime numbersat n=7013