135131

Properties

Appears in sequences

• Non-palindromic primes which on subtracting their reversal give perfect squares.at n=33A080177
• Start with a(1)=1; now a(n+1)=a(n)+a(k) with k=[n-n-th digit of Pi]. If k<0 or k=0, then a(k)=0.at n=45A133389
• Largest prime < n!! (double factorial of n).at n=10A178607
• Primes formed from the concatenation of n and previousprime(n).at n=34A280388
• Primes of the form k!2 - 4, where k!2 is the double factorial number (A006882).at n=4A289850
• Expansion of (1/x) * Series_Reversion( x / ((1+x) * (1+x+x^2)^2) ).at n=7A369477
• Prime numbersat n=12588