31403

Appears in sequences

• Numbers n such that n divides the (left) concatenation of all numbers <= n written in base 13 (most significant digit on right).at n=12A061966
• Numbers n such that sigma(n)=phi(n*bigomega(n)-1).at n=40A067877
• Number of length 3 1..(n+1) arrays with every leading partial sum divisible by 2, 3, 5, 7 or 11.at n=39A254950
• Convolution of Lucas and Jacobsthal numbers.at n=14A264038
• Expansion of (2 + 6*x + 3*x^2 +4*x^3 - 10*x^4)/(1 - x - 4*x^4 + 4*x^5).at n=25A309792