1312200

Appears in sequences

• Convolution of Fibonacci numbers and {F(2), F(3), F(4), ...}.at n=23A023610
• Even refactorable numbers k such that the number r of odd divisors and the number s of even divisors are both odd divisors of k and k is the first number for which the triple (r,s,t) occurs, where t is the number of divisors of k.at n=19A120358
• Determinant of the n X n matrix with (i,j)-entry equal to 1 or 0 according as 2*(i + j) - 1 and 2*(i + j) + 1 are twin primes or not.at n=56A228615