30648

Appears in sequences

• Numbers n such that n and the four successive integers produce primes if substituted for x in the polynomial 5x^2+5x+1. See A090562, A090563. Terms show that longer similar chains also exist.at n=18A090100
• Coefficient Expansion sequence of a Weaver Morse Code polynomial (using Cyclotomic prime base dot, dash, letter space and word space symbols): p(x) = -5 - 10 x - 12 x^2 - 10 x^3 - 7 x^4 - 3 x^5 + 5 x^7 + 8 x^8 + 9 x^9 + 8 x^10 + 6 x^11 + 3 x^12 + x^13.at n=32A143389
• T(n,k)=Number of arrays of n+2 integers in -k..k with sum zero and adjacent elements differing in absolute value.at n=47A202962
• Number of arrays of 5 integers in -n..n with sum zero and adjacent elements differing in absolute value.at n=7A202965
• Numbers n such that 3^7*2^n - 1 is prime.at n=34A230537