31219

Properties

Appears in sequences

• a(n) = a(n-1) + a(n-2) + n, a(0) = a(1) = 1.at n=19A030119
• A simple grammar: partial sums of A008965.at n=19A052825
• Records in A134204.at n=35A133244
• Irregular table with first row containing the single term 3; in the n-th row, n>=2, we list in increasing order those d=2^(n+1)-a, for each term a in all the preceding rows, such that d is prime.at n=39A152871
• Smallest prime greater than n*(n+1)^2/2.at n=39A181956
• Primes of the form 3n^2 + 7.at n=14A201479
• a(n) is the smallest prime p such that there is a multiplicative subgroup H of Z/pZ, of odd order and of index 2n, such that for any two cosets H1 and H2 of H, H1 + H2 contains all of (Z/pZ)\0, except that H+H contains all of (Z/pZ)\0 except -H. If no such prime exists, a(n) = 0.at n=32A294615
• Primes p such that (p^128 + 1)/2 is prime.at n=22A341230
• Prime numbersat n=3363