login
A226074
Numbers k such that k^2+1 is a triangular number and k^2+2 is a prime number.
5
0, 3, 105, 4116315, 9721683943673162520781155, 35285058531373239343849920668944097883186271103498415
OFFSET
1,2
COMMENTS
a(7) has 191 decimal digits: 222247847...170444715.
Corresponding primes and indices of triangular numbers: A226072 and A226073.
Subsequence of A106328. - Max Alekseyev, Jan 30 2014
CROSSREFS
KEYWORD
nonn
AUTHOR
Alex Ratushnyak, May 25 2013
STATUS
approved