70602821

Appears in sequences

• a(n) = 6*a(n-1) - a(n-2), n >= 2, a(0)=1, a(1)=9.at n=10A038761
• a(n) = 2*a(n-1) + a(n-2); a(0)=1, a(1)=4.at n=20A048654
• 2*a(n)^2 + 7 is a square.at n=20A077442
• Start with the sequence S(0)={1,1} and for k>0 define S(k) to be I(S(k-1)) where I denotes the operation of inserting, for i=1,2,3..., the term a(i)+a(i+1) between any two terms for which 4a(i+1)<=5a(i). The listed terms are the initial terms of the limit of this process as k goes to infinity.at n=40A082981
• A nonsense sequence.at n=20A122577
• a(2n) = A001542(n+1), a(2n+1) = A038761(n+1); a Pellian-related sequence.at n=19A129345
• Numbers that are not the sum of distinct terms of A354005.at n=38A354007