228826126

Appears in sequences

• a(n) = a(n-1) + a(n-2) + 1, with a(0) = 0 and a(1) = 2.at n=39A001610
• a(n) = F(2n+1) + F(2n-1) - 1.at n=20A005592
• a(n) = L(3*n)/L(n), where L(n) = Lucas number.at n=20A110391
• a(n) = A014217(n+1) - A115360(n+2).at n=38A142584
• Numbers with equal counts of 1's and 0's in both their binary and Zeckendorf representations.at n=21A327911