OFFSET
0,3
COMMENTS
For n>0 and (n mod 4)<2, a(n) is odd.
Same definition, but k+a(n-2) is a
Fibonacci number: A006498 except first two terms,
Lucas number: A000045 except first two terms,
Pell number: A089928(n-1),
Jacobsthal number: A215095,
factorial: A215096,
square: A194274,
cube: A215097,
triangular number: A011848(n+2),
oblong number: A215098.
Example of a related sequence definition: a(0)=0, a(1)=1, a(n) = least k>a(n-1) such that k+a(n-2) is a cube.
LINKS
Iain Fox, Table of n, a(n) for n = 0..10000
PROG
(Python)
# primes = [2, ..., 401]
prpr = 0
prev = 1
for n in range(77):
print prpr,
b = c = 0
while c<=prev:
c = primes[b] - prpr
b+=1
prpr = prev
prev = c
CROSSREFS
KEYWORD
nonn
AUTHOR
Alex Ratushnyak, Aug 03 2012
STATUS
approved