28177

Appears in sequences

• a(0) = 1, a(n) = 23*n^2 + 2 for n>0.at n=35A010013
• a(n) = n*(4*n^2 + 2*n + 1).at n=19A110451
• Meandric numbers for a river crossing up to 11 parallel roads at n points.at n=12A209626
• Solution of the complementary equation a(n) = a(n-1) + a(n-2) + b(n-2)^2, where a(0) = 2, a(1) = 3, b(0) = 1, and (a(n)) and (b(n)) are increasing complementary sequences.at n=15A296259
• One of the two successive approximations up to 3^n for the 3-adic integer sqrt(-1/2).at n=10A309476