A079849 First differences of A079848.

1, 2, 6, 12, 14, 10, 50, 4, 48, 62, 22, 120, 30, 104, 154, 116, 40, 122, 178, 66, 218, 28, 72, 296, 220, 290, 130, 552, 80, 322, 158, 400, 302, 528, 520, 170, 268, 236, 576, 454, 600, 470, 766, 224, 1090, 666, 180, 764, 868, 606, 572, 294, 738, 70, 918, 1122, 1196

Offset: 1

Author

Amarnath Murthy, Feb 18 2003

Keywords

• nonn

Crossrefs

Cf. A079848.

Programs

Python

from itertools import islice
from sympy import nextprime
def A079849_gen(): # generator of terms
    aset2, alist, k, m = set(), [2], 2, 2
    while (k:=nextprime(k)):
        bset2 = set()
        for a in alist:
            if (b:=k-a) in aset2:
                break
            bset2.add(b)
        else:
            yield k-m
            alist.append(m:=k)
            aset2.update(bset2)
A079849_list = list(islice(A079849_gen(),30)) # Chai Wah Wu, Sep 11 2023

Extensions

Extended by Ray Chandler, Feb 11 2007