3579139413

Appears in sequences

• a(n) = a(n-1) + 2*a(n-2), a(0)=2, a(1)=3.at n=31A048573
• Multiples of 3 which on one operation of the Collatz function T (N -> 3N+1/2^r) yield the number 5.at n=5A072196
• a(n) = 4*a(n-1) + 1 with a(0) = 3.at n=15A072197
• Positions of check bits in code in A075970.at n=5A075972
• Numbers k such that A081252(m)/m^2 has a local maximum for m = k.at n=31A081254
• a(n) is the index of F(n+1) at the unique occurrence of the ordered pair of reversed consecutive terms (F(n+1),F(n)) in Stern's diatomic sequence A002487, where F(k) denotes the k-th term of the Fibonacci sequence A000045.at n=31A086893
• a(n) = 4*a(n-2) + 1 with a(1) = 0, a(2) = 3.at n=31A096773
• A generalized Jacobsthal sequence.at n=30A159290
• a(n) = 4*a(n-2)+1 with initial terms 1,3,7.at n=31A283323
• a(n) is a decimal number k having a length n binary expansion which encodes, from left to right at digit j, the coprimality (0) or non-coprimality (1) of j to n, for 1 < j <= n, except for the first digit, which is always 1.at n=31A306388