80029

Appears in sequences

• Becomes prime after n iterations of f(x) = phi(x)+1 (least inverse of A039651).at n=16A039652
• (1/2)*(n^2+n+2)*(n^2+3*n+1).at n=19A058310
• Sum of primes between n and n^2.at n=31A109818
• Number of lower triangular n X n arrays colored with integers 0 upwards introduced in row major order, with no element equal to any element within a city block distance of two, and containing the value n(n+1)/2-2.at n=27A212039
• Expansion of chi(x^2) / phi(x) in powers of x where phi(), chi() are Ramanujan theta functions.at n=26A246712
• One of the two successive approximations up to 17^n for 17-adic integer sqrt(-2). This is the 10 (mod 17) case (except for n = 0).at n=4A322564
• Indices of triangular numbers that are one-tenth of other triangular numbers.at n=10A341893
• Integers y corresponding to the terms of A342387.at n=4A342388