476767

Appears in sequences

• The first of two consecutive heptagonal numbers the sum of which is equal to the sum of two consecutive primes.at n=12A298465
• The least increasing sequence starting with 1, such that the determinants of the Hankel matrices H1 = [a(0), a(1), ..., a(n); ...; a(n), a(n+1), ..., a(2*n)] and H2 = [a(1), a(2), ..., a(n+1); ...; a(n+1), a(n+2), ..., a(2*n+1)] are > 0.at n=12A376277